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:
Mar. 31, 2009
Filed:
Aug. 21, 2002
Mark Richard Gehring, Portland, OR (US);
Mark Richard Gehring, Portland, OR (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A differential crystal oscillator electronic circuit. Embodiments of the present invention include circuits comprising two substantially similar oscillator circuits. The oscillator circuits may be coupled to a common crystal or ceramic resonator. Embodiments of the present invention are especially well suited to implementation within integrated circuits where their superior common mode and supply rejection function beneficially in opposition to the naturally high coupling characteristics of integrated circuits. Further, by naturally furnishing differential signals, these low noise signals may be used directly by other differential circuits on an integrated circuit, without requiring additional single ended to differential conversion circuitry.