This circuit was obtained from an Electronic Design from 1964. Transistors admit modern equivalents and the range of frequencies generated can be changed.
This circuit was obtained from a Radio Electronics from the 90's. It can generate signals up to a...
This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in...
This ALG or automatic level control of audio signals was obtained from a 1989 RF Communications Handbook...