This circuit uses a dual-gate MOSFET, a rare component today. We found it in American documentation from the 1980s. The rest of the components are common.
Found in the December 1995 issue of Electronics Now, this circuit generates sinusoidal signals. The...
We found this circuit in a 90s Radio Electronics. The circuit generates frequency-modulated 220 kHz signals. The...
The figure shows how to increase the output current to about 50 mA of an operational amplifier. The...