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dc_SWITCHED_CRYSTAL_OSCILLATOR

2016-08-29 11:33  
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dc_SWITCHED_CRYSTAL_OSCILLATOR
This circuit is useful where several different crystal frequencies must be switched using a dc source. The values shown are typical for 40- to 60-MHz third-overtone crystals. Limitation on number of crystals depends on PIN diode capacitance and layout factors, but up to 5 or 10 crystals is possible.