Broadband amplifier (CB9179E)

Found in an old Popular Electronics, this circuit has a gain of 20 dB. The integrated circuit is uncommon today.

Voltage Doubler (CB20196E)
In the figure we have three voltage doubler configurations that can be used in high and low...
Key Lock Circuit (CB24191E)
This circuit was found in the May 1972 issue of Radio Electronics magazine. The activation code...
Capacitance Meter (CB19855E)
The integrated circuit used in this application is uncommon today. The circuit converts...