FM HF OSCILLATOR WITH NO VARACTOR


Posted on Feb 5, 2014

Instead of using a varactor to frequency-modulate a high-frequency oscillator, this circuit uses base-charging capacitance modulation. Consequently, the large voltage change required by a varactor, which can be a major problem in battery-powered systems with limited supply voltages, is elimtnated. T1 is a ceramic coaxial quarter-wave resonator.


FM HF OSCILLATOR WITH NO VARACTOR
Click here to download the full size of the above Circuit.




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