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. 22, 1999
Filed:
Dec. 12, 1997
Steven Tinsley, Garland, TX (US);
Fernando Carvajal, McKinney, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A CMOS oscillator includes two differential input transistors (150) and (152) which have the sources thereof coupled through a resonator element (196). Active loads (166) and (178) provide a squaring up of the output which then drives an output transistor (202). The gates of the differential input transistors (150) and (152) are biased to predetermined voltage levels with bias circuits, with the positive input of the comparator configuration coupled through a feedback capacitor (208) to the output (204). This provides sufficient instability to initiate oscillation with a gain of the device controlled by resonator circuit (196) to be optoimum at the resonant frequency of the resonator circuit.