This circuit is from the 80's documentation. The integrated circuit is from the time but can be implemented with modern equivalents. The power supply must be symmetrical.
This circuit found in a 1993 Electronics Hobbyst Handbook has a very simple configuration that can be used on...
Suggested by Motorola documentation from the 1980s, this circuit can be implemented with...
This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled...