This circuit was obtained in a Motorola documentation from 1968. The circuit uses a power transistor of the time. Modern equivalents according to the load current and voltage can be used.
The oscillator presented uses two inverter buffers as a base and the frequency, which depends on...
The circuit presented in the figure is an amplifier for stereo sources with the Maxim MAX9723...
This circuit is from a 1978 French magazine Electronique Pratique. The magazine no longer exists, but...