[Qrp-Gaijin] shows how to do it with a single transistor ... He found that his original oscillator was driving an overtone crystal at its fundamental frequency. The device worked, but only ...

Increased availability of transistors that can operate at very ... FM modulators, VXOs (a crystal oscillator you can tune slightly), PLL voltage controlled oscillators (VCOs) and tracking filters ...

This evolution to more advanced technologies and internet-of-things (IoT) connected devices has seen increasing demand for ...