Simulation Device... Keyed Peak Detector

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Jim Thompson 18 years ago

I want to build an ideal device for use in PSpice simulations, a Keyed Peak Detector...

Finds the maximum peak value of an input voltage while it's enabled ("keyed"), and "dumps"/outputs zero when not enabled.

Any ideas?

(Ideal elements)

...Jim Thompson

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| 1962 | America: Land of the Free, Because of the Brave

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Joerg 18 years ago

Ask someone at IPCC. They'll find every peak even if it ain't there :-)

SCNR.

Aside from math, can't you use a buffer with (near) zero Zout, an ideal diode, a wee cap? Then when it's keyed off use a FET with 1 femto-ohm Rdson to short out the cap.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

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Jim Thompson 18 years ago

Except that ideal diodes tend not to converge. I'm looking for some mathematical method that is "smooth" ;-)

...Jim Thompson

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Joerg 18 years ago

Maybe you can start with this scenario:

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Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

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Fred Bartoli 18 years ago

Jim Thompson a écrit :

A limited high gain VCVS used as "comparator", a smooth tanh switch and a zero soakage cap?

Don't know if the two first exist in PSPICE.

Thanks, Fred.

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Joerg 18 years ago

In SPICE one can simulate a deliciuous meal that has almost zero calories, no fat and will not add one gram of weight to your body. Then when you actually cook and eat it the cholesterol shoots way up.

Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.

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Jim Thompson 18 years ago

Great minds think alike ;-)

I'm working along the lines of a VCCS with the current that is offset TANH, for good convergence.

...Jim Thompson

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Jim Thompson 18 years ago

Newsgroups: alt.binaries.schematics.electronic Subject: TANH Rectifier (From SED) - TANH-Rectifier.pdf Message-ID:

...Jim Thompson

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Jim Thompson 18 years ago

!@#$%&*

Right under my nose... built-in macros ENVMAX and ENVMIN :-(

...Jim Thompson

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Simulation Device... Keyed Peak Detector

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