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:
Nov. 27, 2007
Filed:
Aug. 10, 2005
Jeffrey M. Hinrichs, San Diego, CA (US);
William R. Goyette, San Marcos, CA (US);
Jeffrey M. Hinrichs, San Diego, CA (US);
William R. Goyette, San Marcos, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
An integrated circuit (IC) resonator in which resonator parameters potentially affected by IC fabrication processes are correctable after fabrication. Resonance frequency tuning is effected by forming each feedback capacitor in a pair of integrator circuits to include a variable capacitance device, such as a varactor diode. A tuning signal is applied to the varactor diode to adjust the total capacitance value and, therefore, the resonance frequency. Similarly, the quality (Q) factor of the resonator is adjusted by providing a variable capacitance in an RC (resistance-capacitance) network coupling the output of one of the integrator circuits to the input of the other. The variable capacitance in the RC network permits adjustment of phase in the event that the integrator circuits do not provide a desired 180° total phase shift.