This circuit was found in a 1970s General Electric documentation. This circuit already used an emitting LED. The circuit operates at frequencies from 50 Hz to 50 kHz with short pulses
The values of the capacitance between output A and ground can be programmed digitally in 18 steps...
This circuit is suitable for low impedance sources, using an operational amplifier. The gain is...
Although it is a common configuration today, this circuit was taken from an old publication. The...