Re: fully differential opamp implementation

Mar 12, 2007 1 Replies


Hi All


>I need a fully differential opamp for my circuit design.
>Unfortunately, the simulator I use, multisim, does not have a build in
>fully differential opamp.
>
>So, I was wondering if any of you have experience implementing a fully
>differential opamp, can you please help me to implement one?
>Any resources (i.e. netlist, circuit diagram) will be really
>appreciated
>
>thanks

See...



Newsgroups: alt.binaries.schematics.electronic Subject: Fully Differential (from S.E.D) - FullyDifferential.pdf Message-ID:



Spice can get cantankerous about "DC path to ground", so the schematic on A.B.S.E gives paths on both sides of the VCVS.



You may also need some large-valued resistors elsewhere in your circuit.



Copy also E-mailed.



...Jim Thompson


| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

Hi Jim I appreciated your help in fixing my fully differential amplifier. Unfortunately, the output of my chopper stabilized amplifier is a square wave which does not match my sine wave input.

You suggested that I "Scope" the outputs of your differential source simultaneous with your switch drive timing. Can you please explain this a little bit more. I don't understand what I need to do

Thanks

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