Quartz crystal compensation circuit

Details Quartz crystal compensation circuit Quartz crystal compensation circuit

1975-12-31

1977-05-03

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

310 82, H03H 900, H04R 1710

Patent

active

040217620

ABSTRACT:
A compensation circuit is provided for a piezo-electric quartz crystal in a filter circuit for reducing the influence of the secondary resonance frequencies of the crystal on the filter characteristic. The Q-value of the crystal at one or several secondary resonance frequencies is reduced by connecting to the crystal a two-terminal network the impedance of which has a real and an imaginary part so that the real part gives an ohmic contribution which at the resonance frequency of the imaginary part reduces the Q-value of the crystal.

REFERENCES:
patent: 2313182 (1943-03-01), Thompson
patent: 2613320 (1952-10-01), Panetta
patent: 2637779 (1953-05-01), Craiglow
patent: 2805400 (1957-09-01), Seddon
patent: 3179906 (1965-04-01), Turvey
patent: 3613032 (1971-10-01), Pond

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