This circuit was found in the component's own manual, which is not very common nowadays. Note that the circuit requires the use of a symmetrical power supply.
This circuit was obtained in an Electronics World of 1969. It is a crystal oscillator with a 100...
This circuit, shown in the figure, consists of a variable gain amplifier with differential input...
This circuit was found in the July 1992 Radio Electronics magazine. Sensitivity adjustment is made...