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.

Touch Switch (CB6028E)
This switch is triggered by the touch of the sensors, which can be two metal plates. These plates...
Integrated Transmitter without Coil (CB14821E)
The TAA131 used in this circuit is not very easy to find today, but an equivalent low power audio...
Resistance Multiplier (CB21114E)
This circuit multiplies the input resistance of an operational amplifier. As the indicated...