Constant current source stabilized semiconductor oscillator

Details Constant current source stabilized semiconductor oscillator Constant current source stabilized semiconductor oscillator

1978-06-16

1980-06-17

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331175, 331177R, H03B 536

Patent

active

042086396

ABSTRACT:
A crystal controlled oscillator has a substantially stable frequency in an environment of wide power supply potential changes. A first CMOS device of a pair is coupled to a crystal network and operates as a substantially small signal linear amplifier. A second CMOS device of the pair forms a constant current source for the first device by means of a plurality of diodes coupled in series circuit between two terminals of the second device to produce a substantially constant biasing potential for the second device only when the potential of the power supply exceeds the value of the diode drop potentials. In this manner, the voltage across the oscillator is relatively independent of power supply voltage changes to provide frequency stability over those changes.

REFERENCES:
patent: 3144619 (1964-08-01), Cochran
patent: 4000459 (1976-12-01), Little
patent: 4013979 (1977-03-01), Vittoz
patent: 4096444 (1978-06-01), Fellrath
patent: 4096496 (1978-06-01), Namata et al.
patent: 4101838 (1978-07-01), Aihara et al.

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