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multiplication using analogLib components

R

rover8898

Jan 1, 1970
0
Hello all,

I feel quite daft for having to ask this:

I am working with Cadence's analog artist environment + Virtuoso
schematic editor. I want to multiply 2 voltages (for testbench
purposes). I can not seem to find a way to do this using the vccs,
cccs dependant sources. Is there a way a simple way to do this ?

(I want to use the product of the voltages to control a vccs in order
to emulate a current path)

Any help will be appreciated.
-Roger
 
G

gert1999

Jan 1, 1970
0
Hello all,

I feel quite daft for having to ask this:

I am working with Cadence's analog artist environment + Virtuoso
schematic editor. I want to multiply 2 voltages (for testbench
purposes). I can not seem to find a way to do this using the vccs,
cccs dependant sources. Is there a way a simple way to do this ?

(I want to use the product of the voltages to control a vccs in order
to emulate a current path)

Any help will be appreciated.
-Roger

Hi

This used to be done with analog multipliers eg AD633. It is a basic
IC that simply calculates the multiplication of 2 voltages
The problem is that those IC's have become very hard to get as in
modern solutions this kind of problem is solved digital

Several years ago I got the same problem in a design and was very
lucky to get a free sample.
I think it might be possible to build the circuit with operational
amplifiers with a special construction of multiple feedback to get the
same result

I hope this might help

Gert
 
A

Andrew Holme

Jan 1, 1970
0
Replying to Bob's post because I don't see gmail posts:

Can't comment on Analog Artist; but in LTSpice I use the "arbitrary
behavioral voltage source" e.g.

SYMATTR InstName B1
SYMATTR Value V=V(carrier)*V(env)
 
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