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. 21, 2005
Filed:
Sep. 03, 2003
Applicants:
Jayendar Rajagopalan, Newcastle, WA (US);
Rob Butler, Issaquah, WA (US);
Inventors:
Jayendar Rajagopalan, Newcastle, WA (US);
Rob Butler, Issaquah, WA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B005/00 ; H03B005/04 ; H03B005/12 ;
U.S. Cl.
CPC ...
Abstract
Periodically, sensed amplitude for the output signal of a voltage-controlled oscillator is compared to a reference and biasing of the voltage-controlled oscillator is correspondingly set, thereby controlling amplitude of the voltage-controlled oscillator output signal. Process and temperature dependencies of the amplitude are eliminated while achieving low phase noise and large signal-to-noise ratio in the output signal, and consequently low phase noise.