CA3080 Amplifier (CB25131E)

This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in Radio Electronics, May 1988.

Instrumentation Amplifier (CB14090E)
This amplifier with differential input uses two old op amps but can be implemented with modern op amps....
2.5 A Regulated Power Supply (CB24099E)
This power supply was found in the December 1970 issue of Radio Electronics magazine. The...
Temperature transmitter (CB9392E)
This circuit is a wireless temperature transmitter for RF signals in the range of 0.2 to 2 MHz...