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400_MC_VARICAP_OSCILLATOR

2016-08-02 20:57  
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400_MC_VARICAP_OSCILLATOR
Wideband frequency modulation of 400-Mc distributed-parameter Colpitts oscillator is obtained with symmetrical transistor in modulator. Q1 is equivalent to two reverse, biased diodes in series for r-f and in parallel with respect to modulating signals and d-c bias.-C. Arsem, Wideband r-m with Capacitance Diodes, Electronics, 32:49, p 112-113.