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Simulation Device... Keyed Peak Detector

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

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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Jim Thompson
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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.

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Regards, Joerg

http://www.analogconsultants.com/

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Joerg

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

...Jim Thompson

--
| James E.Thompson, P.E.                           |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
         America: Land of the Free, Because of the Brave
Reply to
Jim Thompson

Maybe you can start with this scenario:

formatting link 

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Regards, Joerg

http://www.analogconsultants.com/

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Joerg

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.

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Thanks,
Fred.
Reply to
Fred Bartoli

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/

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Use another domain or send PM.
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Joerg

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

--
| James E.Thompson, P.E.                           |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
         America: Land of the Free, Because of the Brave
Reply to
Jim Thompson

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

...Jim Thompson

--
| James E.Thompson, P.E.                           |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
         America: Land of the Free, Because of the Brave
Reply to
Jim Thompson

!@#$%&*

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

...Jim Thompson

--
| James E.Thompson, P.E.                           |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
         America: Land of the Free, Because of the Brave
Reply to
Jim Thompson

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