This amplifier is from Motorola's 1990 Linear Databook. The circuit can be used with operating amplifiers with the same characteristics and the power supply must be symmetrical.
This circuit was obtained from a 1965 General Electric documentation. The components are of the...
This circuit was found in a 1978 British magazine, but it can still be mounted by simply replacing the...
This circuit uses a 100 kHz crystal, but nearby frequencies can be obtained with appropriate...