This circuit was found in the November 1994 issue of Electronics Now magazine. The circuit is based on the 566 PLL and generates signals up to about 200 kHz.
The voltage reference integrated circuit used in this 1980s unit is hard to find today. The power...
The circuit presented was suggested by National Semiconductor in its Linear Applications Handbook. The...
This low frequency oscillator with an operational amplifier of type 741 has adjustment of the mark...