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. 12, 2010
Filed:
Apr. 07, 2006
Alberto Cicalini, San Diego, CA (US);
Alberto Cicalini, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A two-step tuning process for resistors and capacitors in an integrated circuit is described. In the first step of the tuning process, an on-chip adjustable resistor is tuned based on an external resistor to obtain a tuned resistor. The value of the tuned resistor is accurate to within a target percentage determined by the external resistor and the design of the adjustable resistor. In the second step, an adjustable capacitor is tuned based on the tuned resistor and an accurate clock to obtain a tuned capacitor having an accurate value. The adjustable capacitor may be tuned such that an RC time constant for the tuned resistor and the tune capacitor is accurate to within a target percentage determined by the accurate clock and the design of the adjustable capacitor. The resistors and capacitors of other circuits on the integrated circuit may be adjusted based on the tuned resistor and the tuned capacitor, respectively.