The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 1980
Filed:
Jun. 16, 1978
Tedd Stickel, Chalfont, PA (US);
Solid State Scientific Inc., Montgomeryville, PA (US);
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.