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:
Jan. 04, 2011
Filed:
Sep. 08, 2008
Mounir Bohsali, Albany, CA (US);
Ali Kiaei, Cupertino, CA (US);
Gerard Socci, Palo Alto, CA (US);
Masood Yousefi, Cupertino, CA (US);
Ali Djabbari, Saratoga, CA (US);
Ahmad Bahai, Lafayette, CA (US);
Mounir Bohsali, Albany, CA (US);
Ali Kiaei, Cupertino, CA (US);
Gerard Socci, Palo Alto, CA (US);
Masood Yousefi, Cupertino, CA (US);
Ali Djabbari, Saratoga, CA (US);
Ahmad Bahai, Lafayette, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An oscillator, including amplifier circuitry and resonant circuitry, for providing an oscillation signal with a controllable frequency while maintaining a substantially constant steady state magnitude. Controllable reactive circuitry, included as part of the amplifier circuitry, has a reactance which can be controlled such that the resistive components of the amplifier circuitry and resonant circuitry impedances remain substantially equal. When in the form of serially coupled, controllable capacitances, the controllable reactive circuitry is controlled such that a ratio of changes in the controllable capacitances is approximately equal to a negative ratio of the capacitance values.