This circuit with RIAA equalization is from 1985 US documentation. The circuit has a flat response of 150 Hz to 40 kHz. The power supply must be symmetrical.
The ZN414 integrated circuit consists of a complete radio from the 1980s. This single receiver...
We find this circuit in an old documentation, but it can be implemented with modern equivalent...
Using this circuit a low current switch can be used in the control of heavy duty loads, powered...