Quartz oscillator with electronic commutation. Scheme, description

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Quartz oscillator with electronic commutation. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Knots of amateur radio equipment. Generators, heterodynes

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B. Shadler proposed a circuit for an electrically switched quartz oscillator (Fig. 1). The required quartz from the X1-Xp set (any one with a fundamental resonance frequency from 1 to 15 MHz can be used) is connected to the output of the comparator IC1 when the supply voltage is applied to one of the resistors R1-Rn. This opens one of the diodes D1-Dn and the corresponding quartz resonator is included in the POS circuit from the output of IC1 to its input, causing generation at "its" frequency.

Electronically Commutated Crystal Oscillator
Ris.1

Author: B.Shadler; Publication: N. Bolshakov, rf.atnn.ru

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