This circuit is used to detect PLL signals from the 4046 IC. The circuit is from an Electronics Now from October 1994. The indication is made through LEDs.
This amplifier provides 20 W of power on each channel, containing separate filters to power a...
This circuit of a few watts of power shows a typical configuration from the 70s using driver and...
We found this circuit in a 1980s Motorola documentation. The circuit makes use of common operating...