This circuit has tone control, and its power depends on the supply voltage. The circuit is from the Philips integrated circuits manual from 1990.
We found this circuit in a 1967 Electronic Design. The circuit used a MOSFET of the time, which is...
This circuit was obtained from old documentation, triggering when there is a power cut on the...
We found this circuit in a 1987 documentation. Its purpose is to turn on a garage light using the...