Found in a 1980s American documentation, this crystal-controlled oscillator generates 100 MHz signals. The crystal used is 20 MHz. Modern equivalent transistors can be used.
This circuit compresses the dynamic range (amplitudes) of an audio signal. The circuit is passive and...
This circuit was found in the July 1991 issue of Radio Electronics magazine. It converts a binary...
This circuit generates signals with opposite phases determined by C1 and adjusted by R2. The...