Crystal oscillator circuit capable of changing the number of inv

Details Crystal oscillator circuit capable of changing the number of inv Crystal oscillator circuit capable of changing the number of inv

1980-01-09

1982-03-23

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331158, 368159, H03B 536

Patent

active

043215629

ABSTRACT:
A single-stage inverter forming a closed loop together with a crystal resonator fails to provide sufficient gain and hence, power consumption becomes high during stable oscillation. If inverters are coupled together in a three-stage cascade-connection, on the other hand, the gain becomes excessively high and undesired high frequency oscillation takes place at the start of oscillation. This invention provides a crystal oscillator circuit which, in order to solve these problems, uses a single-stage inverter to form a closed loop with a crystal resonator at the start of oscillation and uses three-stage inverters cascade-connected with each other during stable oscillation.

REFERENCES:
patent: 3676801 (1972-07-01), Musa
patent: 4039973 (1977-08-01), Yamashiro
patent: 4218661 (1980-08-01), Imamura

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