Found in older Signetics documentation, this circuit generates signals from 30 Hz to 25 kHz. Operational amplifiers are from the time, as is the matching pair of transistors.
This circuit uses an unusual operational amplifier nowadays and has a very low consumption. The...
In the figure we have a wireless wiretapping circuit for the frequency range determined by L1. For FM...
This negative bias circuit provides negative voltages from 3.5 to 6.5 V sources. The circuit was...