This circuit was found in documentation from the 1970s. However, it can be implemented with modern transistors such as 2N2222 for Q1 and BF494 for Q2. The crystal depends on the desired frequency.
This oscillator from an old publication uses one of the first commercial transistors, the CK722....
This circuit compares the phases of two signals applied to the input, providing an output...
The purpose of this circuit is to enable testing of transistors using a common multimeter. With the...