This low noise microphone preamplifier circuit was found in American documentation from the 90s. The circuit requires special care with the layout. The power can be between 9 and 18 V.
Found in a 1980s documentation, this circuit uses a photo-Darlington. There must be an optical...
We have here an ultra-simple amplifier stage of just one transistor, which can have some uses on...
This conventional window detector circuit was found in a 1995 documentation. The trigger points, that...