[sdiy] An unusual opamp only four quadrant multiplier

Paul Perry pfperry at melbpc.org.au
Sat Apr 3 06:02:05 CEST 2021

This is ingenious, but in practice the problem will be finding two 
op amps - and you can't use op amps in the same package because you need
separate power supply connectors.

It's great to see the "sum of squares" multiplier make a comeback - I
haven't seen this used for more than 50 years!

paul perry melbourne australia

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