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. 10, 2012
Filed:
Jan. 12, 2008
Justin O'day, Detroit, MI (US);
Michael Shannon Mccorquodale, Ann Arbor, MI (US);
Scott Michael Pernia, Pinckney, MI (US);
Nam Duc Nguyen, San Jose, CA (US);
Ralph Beaudouin, East Palo Alto, CA (US);
Sundus Kubba, Saline, MI (US);
Justin O'Day, Detroit, MI (US);
Michael Shannon McCorquodale, Ann Arbor, MI (US);
Scott Michael Pernia, Pinckney, MI (US);
Nam Duc Nguyen, San Jose, CA (US);
Ralph Beaudouin, East Palo Alto, CA (US);
Sundus Kubba, Saline, MI (US);
Integrated Device Technology, Inc., San Jose, CA (US);
Abstract
Exemplary embodiments of the invention provide a reference signal generator having a controlled quality ('Q') factor. An exemplary apparatus to generate a harmonic reference signal includes a reference resonator, such as an LC-tank, which generates a first reference signal having a resonant frequency, and a plurality of reactance modules couplable to the reference resonator. Each reactance module comprises one or more reactance unit cells, and each reactance unit cell comprises a reactance element coupled in series to a switching element. In exemplary embodiments, the reactance element is a capacitor having a predetermined unit of capacitance, and the switching element is a transistor having a predetermined resistance when in an off state. The ratio of capacitance to resistance is substantially constant for all reactance modules of the plurality of reactance modules.