The circuit shown is from Texas Instruments optoelectronics documentation. The input signal is audio and equivalent LEDs can be used. Other operational amplifiers can also be used.
The purpose of this circuit is to monitor the phase pulses of a logic circuit, checking if they...
This 1/2 hertz high selectivity filter was found in the December 1990 issue of Radio Electronics...
This circuit is from a 70s Burr Brown documentation. The components are from the time and the...