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PICList Thread
'[EE]:PSPICE'
2000\08\21@181152 by Plunkett, Dennis

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Hello all,
I am attempting to simulate an OPAMP oscillator in PSPICE with a dual gang
variable resistor.
While I can use Transient analysis to see the steady state frequency
generated, how can I present a variation on the variable resistor and see
the frequency change? Do I have to select a range and simulate a transient
response for each point? Or is there a way to do this on the fly?

Dennis

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2000\08\21@183102 by hard Prosser

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Your best bet may be to relate the R_var attribute "SET" setting to a
global parameter.  (e.g.SET = {setting *1} where "setting" is defined as a
global parameter). Then you can simulate for a number of different values
in the global parameter. It may depend somewhat on the actual model you are
using for the pot. - and also the version of Pspice you are using.

By using a global parameter it also makes it easy to change the dual gang
pot segments simultaneously.

Richard P





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Hello all,
I am attempting to simulate an OPAMP oscillator in PSPICE with a dual gang
variable resistor.
While I can use Transient analysis to see the steady state frequency
generated, how can I present a variation on the variable resistor and see
the frequency change? Do I have to select a range and simulate a transient
response for each point? Or is there a way to do this on the fly?

Dennis

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