This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s documentation. CN is the neutralizing capacitor.
This sensitive circuit detects the live pole of a power grid or outlet. The circuit makes use of a high...
The circuit shown in the figure is suggested by Micrel, based on the MIC2570 boost voltage...
This QST circuit generates 4 frequency signals according to the crystals used. Transistors admit...