FET Switch (CB6725E)

This switched filter was found in the 1969 documentation. The FET should be current-matched and eventually equipped with a heat sink.

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Debouncer (CB9277E)
This circuit was found in a 1967 American documentation. The switching diode (tunnel) used is an...
741 Preamplifier with Balanced Output (CB13673E)
This circuit was found in a 1975 documentation. Operational amplifiers must have a symmetrical source and...
Tunable Fourth Order Filter with the 741 (CB13710E)
The diagram shown was found in a 1975 active filter manual. The tuned frequency range depends on...