This circuit provides signals in phase with the input and with the phase inverted. The circuit was found in documentation from the 1990s. Transistors are commonly used.
This crystal-controlled 1000 kHz oscillator was found in 1980s American documentation. The...
This circuit allows the control of audio signals from a DC signal obtained from a simple switch. We...
One of the most traditional voltage regulator circuits, quite old, but still in frequent use even...