Pre selector with varicap tuning (CB9172E)

This circuit for the medium wave range was suggested by a Popular Electronics from the 90s. The double port MOSFET is an unusual component today.

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Gain 100 Sample and Hold (CB10107E)
This circuit was obtained in a documentation from the 70s. The operational amplifiers used are...
Second order polynomial generator (CB7902E)
Found in an Electronic Design from the 90s, this circuit generates a mathematical function given by the...
Triac Dimmer (CB24124E)
This is one of many power control or dimmer configurations that we have found on this site and in...