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 |

PA7601 amplifier (CB7115E)
This circuit with the PA7601 was found in a 1967 Philco-Ford documentation. The circuit has a pass...
Controlled Photo Timer (CB18731E)
After starting, this circuit turns off the relay in a time that depends on the 4020 pulse-count. This...
Stage with FET and Bipolar (CB6152E)
This circuit is from an Electronics World of 1967. The described calculations can be applied to...