Analog multiplier (CB7392E)

Suggested by Fairchild in a 1980s publication, this multiplier uses operational amplifiers from that time. The power supply must be symmetrical.

| Clique na imagem para ampliar |

An electric heater (CB24186E)
This circuit is from a Radio Electronics issue of May 1972. It consists of a commercial heating...
Crystal test (CB7538E)
Found in the American 73 magazine for radio amateurs, this circuit can test common quartz...
Deviation Compensation Amplifier (CB14066E)
This circuit is from the 1995 National Semiuconductor Linear Application Handbook. The technique...