Post by thread:[EE]: High Voltage Transistors or Op Amps..

Jim Paul wrote: > > All, > > Does anyone have any ideas for high voltage transistors? I need some with > a BVCEO of between 1200 and 3000 VDC. I know this is quite an order, but > I don't see any way aorund it at this time. If no transistors are available, some > high voltage op amps are available from APEX, but at $550.00 per amp, and I > need two, that gets quite expensive. Anyway, if anyone has any ideas, let me > know. That spec is often seen in the TV industry, not common but available. Try some of the T0-3 types used in older Sanyo sets, 2500v/3000v 5A is common. Also, I have seen some TV manufacturers errata sheets that show these transistors can be replaced with more common (lower volt spec) types, usually with the addition of a simple snubber consisting of a 6kv ceramic and a resistor. I think the big problem is the slew rate, if you slow the change of voltage across the transistor, the higher voltage can be better tolerated. From memory, one errata sheet showed the 3000v transistor could be replaced by a much more common 2000v one simply by adding the snubber. Hope that helps, I you want part numbers I can check further. If you have a modern transistor book, look for all the transistors marked as "TV h-out" and you should find something. :o) -Roman -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu

At 12:36 AM 5/31/01 -0500, you wrote: >All, > >Does anyone have any ideas for high voltage transistors? I need some with >a BVCEO of between 1200 and 3000 VDC. I know this is quite an order, but >I don't see any way aorund it at this time. If no transistors are available, some >high voltage op amps are available from APEX, but at $550.00 per amp, and I >need two, that gets quite expensive. Anyway, if anyone has any ideas, let me >know. Also you'll be waiting a long time for anything from Apex. As has been suggested, try horizontal output NPN BJTs for big-screen, projection and HD television sets. Probably Japanese manufacturers/part numbers. Also you could consider IGBTs from places such as http://www.irf.com, they are easily available and cheap at 1200V. AFAIK, there is nothing available that is PNP and very high voltage, so review your output topologies if you need push-pull. Best regards, =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Spehro Pefhany --"it's the network..." "The Journey is the reward" speffKILLspaminterlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu

Roman, Thanks. Part numbers would be great. Although this isn't for a TV, I thought of HO transistors when I was asked to find something. I would appreciate some numbers though. Thanks and Regards, Jim On Thu, 31 May 2001, Roman Black wrote: {Quote hidden}> > Jim Paul wrote: > > > > All, > > > > Does anyone have any ideas for high voltage transistors? I need some with > > a BVCEO of between 1200 and 3000 VDC. I know this is quite an order, but > > I don't see any way aorund it at this time. If no transistors are available, some > > high voltage op amps are available from APEX, but at $550.00 per amp, and I > > need two, that gets quite expensive. Anyway, if anyone has any ideas, let me > > know. > > > That spec is often seen in the TV industry, not > common but available. Try some of the T0-3 types > used in older Sanyo sets, 2500v/3000v 5A is common. > > Also, I have seen some TV manufacturers errata > sheets that show these transistors can be replaced > with more common (lower volt spec) types, usually > with the addition of a simple snubber consisting of > a 6kv ceramic and a resistor. > > I think the big problem is the slew rate, if you slow > the change of voltage across the transistor, the > higher voltage can be better tolerated. From memory, > one errata sheet showed the 3000v transistor could be > replaced by a much more common 2000v one simply by > adding the snubber. > > Hope that helps, I you want part numbers I can check > further. If you have a modern transistor book, look for > all the transistors marked as "TV h-out" and you should > find something. :o) > -Roman > > -- > http://www.piclist.com hint: To leave the PICList > EraseMEpiclist-unsubscribe-requestspam_OUTTakeThisOuTmitvma.mit.edu jimspam_OUTjpes.com -- http://www.piclist.com hint: To leave the PICList @spam@piclist-unsubscribe-requestKILLspammitvma.mit.edu

Thanks to all who replied to this request. I appreciate the help. These transistors are to be used in an electrostatic deflection project. Current handling and power handling capability are of only minor importance since the currents needed are just a few uA. But I'll try some of these and see what happens. Thanks again, Jim On Fri, 01 June 2001, Spehro Pefhany wrote: {Quote hidden}> > At 06:12 AM 5/31/01 -0700, you wrote: > > Roman, > > > > Thanks. Part numbers would be great. Although this isn't > > for a TV, I thought of HO transistors when I was asked to find > > something. I would appreciate some numbers though. > > Consider a 2SC4760, Vcbo = 2,000 V, Ic = 8A, Pd = 200W (Tc = 25'C). > > Best regards, > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > Spehro Pefhany --"it's the network..." "The Journey is the reward" > RemoveMEspeffTakeThisOuTspaminterlog.com Info for manufacturers: http://www.trexon.com > Embedded software/hardware/analog Info for designers: http://www.speff.com > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads EraseMEjimspamspamBeGonejpes.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Does anyone have any ideas for high voltage transistors? I need some with a BVCEO of between 1200 and 3000 VDC. I know this is quite an order, but I don't see any way aorund it at this time. If no transistors are available, some high voltage op amps are available from APEX, but at $550.00 per amp, and I need two, that gets quite expensive. Anyway, if anyone has any ideas, let me know. What are you using them for? What sort of power / current ratings do you need? Here are some candidates: BU226 SI-N 2000V 1.5A 10W TO3 2SC1413A SI-N 1200V 5A 50W 2SC3178 SI-N 1200V 2A 60W 2SC3642 SI-N 1200V 6A 100W 200ns BUV48C SI-N 1200/700V 15A 150W BUX98C SI-N 1200V 30A 250W 5MHz MJW16206 SI-N 1200V 12A 150W 3MHz 2SC5045 SI-N 1600V 15A 75W 2SC5047 SI-N 1600V 25A 250W 2SC5048 SI-N 1500V 12A 50W 0.3us 2SC5244A SI-N 1600V 30A 200W 2SC3026 SI-N 1700V 5A 50W POWER 2SC4532 SI-N 1700V 10A 200W 2uS 2SC4538 SI-N 900V 5A 80W 2SC5144 SI-N 1700V 20A 200W 2SC5150 SI-N 1700V 10A 50W 03us 2SD2253 SI-N+D 1700V 6A 50W BDX32 SI-N 1700V 4A 40W BU208D SI-N+D 1500V 8A 150W BU209 SI-N 1700V 4A 12.5W TO3 BU2527AX SI-N 1500V 12A 45W 0.2US BU2722AF SI-N 1700V 10A 45W BUH515D SI-N+D 1500/700V 8A 60W BUH517 SI-N 1700V 8A 60W 3.9us BUY71 SI-N 2200V 2A 40W HORDEFL regards Russell McMahon -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Hi Jim, I don't know if you are aware of the concept of "stacking" transistors to get them to operate at higher voltages, if fast switching speeds are not important. This scheme is not universal, but for simple switching to gnd it is rather well suited. Unfortunately I haven't used it in years, will have to look up the schematic at home. I'll try my best to describe it here... It works along the following lines: You have one transistor configured normally, but the collector of this one (NPN example) is connected to the emitter of the one above, and the base is connected to the other base via a resistor, and so on, you get a vertical line of transistors, and the resistor ladder connected to the bases will distribute the voltage in equal portions among the transistors. The current through all of this is adjusted by the bottom transistor, you can even add some feedback and so on. Just keep in mind that the resistor ladder has to have a value suited to the application...and some HV transistors may have external metal parts, then being at considerable voltage....also if one of the resistors develops a fault, one of the transistors will be overloaded, then the next etc.. But perhaps this can help with some K-Volts. My 0,02 Euro worth.... Greets Jochen Feldhaar DH6FAZ James Paul schrieb: {Quote hidden}> Thanks to all who replied to this request. I appreciate the help. > These transistors are to be used in an electrostatic deflection > project. Current handling and power handling capability are of > only minor importance since the currents needed are just a few uA. > But I'll try some of these and see what happens. > > Thanks again, > > Jim > > On Fri, 01 June 2001, Spehro Pefhany wrote: > > > > > At 06:12 AM 5/31/01 -0700, you wrote: > > > Roman, > > > > > > Thanks. Part numbers would be great. Although this isn't > > > for a TV, I thought of HO transistors when I was asked to find > > > something. I would appreciate some numbers though. > > > > Consider a 2SC4760, Vcbo = 2,000 V, Ic = 8A, Pd = 200W (Tc = 25'C). > > > > Best regards, > > > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > Spehro Pefhany --"it's the network..." "The Journey is the reward" > > RemoveMEspeffKILLspaminterlog.com Info for manufacturers: http://www.trexon.com > > Embedded software/hardware/analog Info for designers: http://www.speff.com > > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > jimSTOPspamspam_OUTjpes.com > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

All, In my request for HV Transistors, it appears as though I may not have given enough information. Some of you have suggested transistors to be used in switch mode. Actually, these will be operated class 'A' as linear amplifiers. Frequency response is basically a don't care. Frequencies involves are DC to about 2Khz or so. Same with current and power handling capability. They will be used in a static deflection application. They will be driven with a 0 to 5 volt analog level, and will output 0 to 2500 volts DC or so. As soon as I can find some suitable transistors and get a circuit designed to fill my specs, I'll share it with all if I'm allowed. This is for my work, so it my be considered proprietary. Anyway, I'll do what I can. And thanks to all for your suggestions so far. If you find anything else, don't hesitate to let me know. I'll take all I can get. And the more parts I have to choose from, could allow more substitutions, therefore it will be easier to duplicate. Thanks and Regards, Jim On Fri, 01 June 2001, "J.Feldhaar" wrote: {Quote hidden}> > Hi Jim, > > I don't know if you are aware of the concept of "stacking" transistors to get them > to operate at higher voltages, if fast switching speeds are not important. > This scheme is not universal, but for simple switching to gnd it is rather well > suited. Unfortunately I haven't used it in years, will have to look up the > schematic at home. I'll try my best to describe it here... > It works along the following lines: You have one transistor configured normally, > but the collector of this one (NPN example) is connected to the emitter of the one > above, and the base is connected to the other base via a resistor, and so on, you > get a vertical line of transistors, and the resistor ladder connected to the bases > will distribute the voltage in equal portions among the transistors. The current > through all of this is adjusted by the bottom transistor, you can even add some > feedback and so on. Just keep in mind that the resistor ladder has to have a value > suited to the application...and some HV transistors may have external metal parts, > then being at considerable voltage....also if one of the resistors develops a > fault, one of the transistors will be overloaded, then the next etc.. > > But perhaps this can help with some K-Volts. > > My 0,02 Euro worth.... > > Greets > Jochen Feldhaar DH6FAZ > > James Paul schrieb: > > > Thanks to all who replied to this request. I appreciate the help. > > These transistors are to be used in an electrostatic deflection > > project. Current handling and power handling capability are of > > only minor importance since the currents needed are just a few uA. > > But I'll try some of these and see what happens. > > > > Thanks again, > > > > Jim > > > > On Fri, 01 June 2001, Spehro Pefhany wrote: > > > > > > > > At 06:12 AM 5/31/01 -0700, you wrote: > > > > Roman, > > > > > > > > Thanks. Part numbers would be great. Although this isn't > > > > for a TV, I thought of HO transistors when I was asked to find > > > > something. I would appreciate some numbers though. > > > > > > Consider a 2SC4760, Vcbo = 2,000 V, Ic = 8A, Pd = 200W (Tc = 25'C). > > > > > > Best regards, > > > > > > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > Spehro Pefhany --"it's the network..." "The Journey is the reward" > > > spamBeGonespeffSTOPspamEraseMEinterlog.com Info for manufacturers: http://www.trexon.com > > > Embedded software/hardware/analog Info for designers: http://www.speff.com > > > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > > > -- > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > KILLspamjimspamBeGonejpes.com > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads EraseMEjimEraseMEjpes.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

If it wasn't work related, I would have suggested vacuum tubes. James Paul wrote: {Quote hidden}> All, > > In my request for HV Transistors, it appears as though I may not > have given enough information. Some of you have suggested > transistors to be used in switch mode. Actually, these will be > operated class 'A' as linear amplifiers. Frequency response is > basically a don't care. Frequencies involves are DC to about 2Khz > or so. Same with current and power handling capability. They > will be used in a static deflection application. They will be > driven with a 0 to 5 volt analog level, and will output 0 to 2500 > volts DC or so. As soon as I can find some suitable transistors > and get a circuit designed to fill my specs, I'll share it with all > if I'm allowed. This is for my work, so it my be considered > proprietary. Anyway, I'll do what I can. And thanks to all for > your suggestions so far. If you find anything else, don't hesitate > to let me know. I'll take all I can get. And the more parts I > have to choose from, could allow more substitutions, therefore it > will be easier to duplicate. > > Thanks and Regards, > > Jim > > On Fri, 01 June 2001, "J.Feldhaar" wrote: > > > > > Hi Jim, > > > > I don't know if you are aware of the concept of "stacking" transistors to get them > > to operate at higher voltages, if fast switching speeds are not important. > > This scheme is not universal, but for simple switching to gnd it is rather well > > suited. Unfortunately I haven't used it in years, will have to look up the > > schematic at home. I'll try my best to describe it here... > > It works along the following lines: You have one transistor configured normally, > > but the collector of this one (NPN example) is connected to the emitter of the one > > above, and the base is connected to the other base via a resistor, and so on, you > > get a vertical line of transistors, and the resistor ladder connected to the bases > > will distribute the voltage in equal portions among the transistors. The current > > through all of this is adjusted by the bottom transistor, you can even add some > > feedback and so on. Just keep in mind that the resistor ladder has to have a value > > suited to the application...and some HV transistors may have external metal parts, > > then being at considerable voltage....also if one of the resistors develops a > > fault, one of the transistors will be overloaded, then the next etc.. > > > > But perhaps this can help with some K-Volts. > > > > My 0,02 Euro worth.... > > > > Greets > > Jochen Feldhaar DH6FAZ > > > > James Paul schrieb: > > > > > Thanks to all who replied to this request. I appreciate the help. > > > These transistors are to be used in an electrostatic deflection > > > project. Current handling and power handling capability are of > > > only minor importance since the currents needed are just a few uA. > > > But I'll try some of these and see what happens. > > > > > > Thanks again, > > > > > > Jim > > > > > > On Fri, 01 June 2001, Spehro Pefhany wrote: > > > > > > > > > > > At 06:12 AM 5/31/01 -0700, you wrote: > > > > > Roman, > > > > > > > > > > Thanks. Part numbers would be great. Although this isn't > > > > > for a TV, I thought of HO transistors when I was asked to find > > > > > something. I would appreciate some numbers though. > > > > > > > > Consider a 2SC4760, Vcbo = 2,000 V, Ic = 8A, Pd = 200W (Tc = 25'C). > > > > > > > > Best regards, > > > > > > > > > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > Spehro Pefhany --"it's the network..." "The Journey is the reward" > > > > @spam@speff@spam@spam_OUTinterlog.com Info for manufacturers: http://www.trexon.com > > > > Embedded software/hardware/analog Info for designers: http://www.speff.com > > > > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > > > > > -- > > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > > spamBeGonejimKILLspamjpes.com > > > > > > -- > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > .....jimspam_OUTjpes.com > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Hi Jim, you should have no probs with the big TV h-out transistors. These switch about 120w at 2kv+ p/p and 15kHz rate. Your requirements are much more gentle. :o) -Roman James Paul wrote: {Quote hidden}> > All, > > In my request for HV Transistors, it appears as though I may not > have given enough information. Some of you have suggested > transistors to be used in switch mode. Actually, these will be > operated class 'A' as linear amplifiers. Frequency response is > basically a don't care. Frequencies involves are DC to about 2Khz > or so. Same with current and power handling capability. They > will be used in a static deflection application. They will be > driven with a 0 to 5 volt analog level, and will output 0 to 2500 > volts DC or so. As soon as I can find some suitable transistors > and get a circuit designed to fill my specs, I'll share it with all > if I'm allowed. This is for my work, so it my be considered > proprietary. Anyway, I'll do what I can. And thanks to all for > your suggestions so far. If you find anything else, don't hesitate > to let me know. I'll take all I can get. And the more parts I > have to choose from, could allow more substitutions, therefore it > will be easier to duplicate. > > Thanks and Regards, > > Jim > > On Fri, 01 June 2001, "J.Feldhaar" wrote: > > > > > Hi Jim, > > > > I don't know if you are aware of the concept of "stacking" transistors to get them > > to operate at higher voltages, if fast switching speeds are not important. > > This scheme is not universal, but for simple switching to gnd it is rather well > > suited. Unfortunately I haven't used it in years, will have to look up the > > schematic at home. I'll try my best to describe it here... > > It works along the following lines: You have one transistor configured normally, > > but the collector of this one (NPN example) is connected to the emitter of the one > > above, and the base is connected to the other base via a resistor, and so on, you > > get a vertical line of transistors, and the resistor ladder connected to the bases > > will distribute the voltage in equal portions among the transistors. The current > > through all of this is adjusted by the bottom transistor, you can even add some > > feedback and so on. Just keep in mind that the resistor ladder has to have a value > > suited to the application...and some HV transistors may have external metal parts, > > then being at considerable voltage....also if one of the resistors develops a > > fault, one of the transistors will be overloaded, then the next etc.. > > > > But perhaps this can help with some K-Volts. > > > > My 0,02 Euro worth.... > > > > Greets > > Jochen Feldhaar DH6FAZ > > > > James Paul schrieb: > > > > > Thanks to all who replied to this request. I appreciate the help. > > > These transistors are to be used in an electrostatic deflection > > > project. Current handling and power handling capability are of > > > only minor importance since the currents needed are just a few uA. > > > But I'll try some of these and see what happens. > > > > > > Thanks again, > > > > > > Jim > > > > > > On Fri, 01 June 2001, Spehro Pefhany wrote: > > > > > > > > > > > At 06:12 AM 5/31/01 -0700, you wrote: > > > > > Roman, > > > > > > > > > > Thanks. Part numbers would be great. Although this isn't > > > > > for a TV, I thought of HO transistors when I was asked to find > > > > > something. I would appreciate some numbers though. > > > > > > > > Consider a 2SC4760, Vcbo = 2,000 V, Ic = 8A, Pd = 200W (Tc = 25'C). > > > > > > > > Best regards, > > > > > > > > > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > Spehro Pefhany --"it's the network..." "The Journey is the reward" > > > > TakeThisOuTspeff.....TakeThisOuTinterlog.com Info for manufacturers: http://www.trexon.com > > > > Embedded software/hardware/analog Info for designers: http://www.speff.com > > > > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > > > > > -- > > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > > TakeThisOuTjimKILLspamspamjpes.com > > > > > > -- > > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > .....jimRemoveMEjpes.com > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Unfortunately no. These frequencies are the range of the electrostatic device, so therefore must be used. We have a DC-DC power brick that allows 0-12 volts DC in, and gives out 0 2500 volts DC that is proportional to the input. These are about $150.00 or so each. And the power bricks are not designed to be fed a varying voltage at that rate. They were designed to be programmed to one voltage and remain there. If anyone is interested in the device I'm working with, go to http://www.i-o.com and look for the "MEMS" link. Go to the "MEMS" pages and you'll see a "DuraScan" TM mirror link. Click this and you'll see what I'm working with. There are also some white papers and other discussion of this device there. If anyone wants to use one of these in their application, or you know of someone who does, have them contact one of the persons listed and tell them I (Jim Paul) sent you. I won't get anything for it, but they'll at least know that I'm helping to promote it. There is also some information on the "MEMS Accelerometer" there too. Same here as far as applications are concerned. Just call one of the persons listed. And since I've gone this far telling about my work, as an FYI, "Applied MEMS" an Input-Output Company, where I work, has one of the few "Bulk Micromachining Fabs" in the world. We have had several customers visit the fab and all have said how impressed they were with the facility and how l;eading edge the technology is and how all of the equipment is first rate and about the best in the business. So if anyone needs any bulk micromachining done, again call one of the persons listed there. Especially Howard Goldberg, or Jeff Gannon. and again, tell them I sent you. And if there are any more suggestions for HV Transistors, keep them coming. Thanks and Regards, Jim {Original Message removed}