Title: Constant current source stabilized semiconductor oscillator

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.

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Inventors: Stickel, Tedd (Chalfont, PA, US)

Application Number: 916224
Filing Date: 1978-06-16
Publication_date: 1980-06-17
Assignee: Solid State Scientific Inc. (Montgomeryville, PA)
Primary Class(es): 331/116FE 331/175, 331/177R
Other Classes:
US Patent Ref:

3144619	Aug, 1964	Cochran	331/109.
4000459	Dec, 1976	Little	331/183.
4013979	Mar, 1977	Vittoz	331/116.
4096444	Jun, 1978	Fellrath	331/116.
4096496	Jun, 1978	Namata et al.	331/116.
4101838	Jul, 1978	Aihara et al.	331/51.

Other Refs:
Primary Examiner: Grimm, Siegfried H.
Assistant Examiner:
Attorney: Frailey & Ratner