Inverting CMOS Amplifier (CB25577E)

This gain 10 CMOS op amp was found in the May 1993 issue of Electronics Now magazine. It is applicable to any op amp.

Decade Counter with Nixie Tube (CB20141E)
This is an old test circuit for integrated TTL counters, feeding a Nixie tube, common at the time....
Two-Transistor Oscillator (CB1387E )
This old oscillator using germanium transistors has a high impedance headphone as inductor to...
Tone Control Preamplifier (CB18561E)
This preamp with several inputs using germanium transistors from the time was found in Japanese...