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:
Aug. 27, 2013
Filed:
Aug. 15, 2011
Yen-horng Chen, Taipei, TW;
Wen-chang Lee, Taipei, TW;
Augusto Marques, Moscavide, PT;
Xiaochuan Guo, Austin, TX (US);
Yen-Horng Chen, Taipei, TW;
Wen-Chang Lee, Taipei, TW;
Augusto Marques, Moscavide, PT;
Xiaochuan Guo, Austin, TX (US);
Mediatek Singapore Pte. Ltd., Singapore, SG;
Abstract
A digitally controlled oscillator is provided. The digitally controlled oscillator includes a pair of transistors cross-coupled to each other, a switched capacitor array coupled to the pair of transistors and a plurality of frequency tracking units coupled to the pair of transistors. The pair of transistors provides an output signal. The switched capacitor array tunes a frequency of the output signal. The frequency tracking units tune the frequency of the output signal to a target frequency. At least one of the frequency tracking units is capable of selectively providing a first capacitance and a second capacitance. A tuning resolution of the frequency tracking unit is determined by a difference between the first and second capacitances.