The figure shows a way to apply gain control to the LM3600 OTA. The circuit is from a Radio Electronics from July 1988.
This filter was obtained from a Linear Technology manual from the 1990s. The power supply must be...
Found in a 90s Popular Electronics, this circuit is intended for amplifying analog video signals....
Based on a 555, this 80's American documentation circuit detects the voltage of a battery and can then...