This amplifier, from Philips Databook is suitable for automotive applications. The input resistance is 60k ohms and the frequency range is 20 to 20 kHz.
This circuit can control two loads and is also equipped with a light sensor for its trip. The...
This circuit from an old Radio Electronics is used to connect headphones to the output of...
The circuit shown in figure is suggested by Maxim in an application note. The operational...