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. 05, 2012
Filed:
Sep. 02, 2010
You-jen Wang, Taipei, TW;
Shen-iuan Liu, Taipei, TW;
Feng-wei Kuo, Zhudong, TW;
Chewn-pu Jou, Chutung, TW;
Fu-lung Hsueh, Cranbury, NJ (US);
You-Jen Wang, Taipei, TW;
Shen-Iuan Liu, Taipei, TW;
Feng-Wei Kuo, Zhudong, TW;
Chewn-Pu Jou, Chutung, TW;
Fu-Lung Hsueh, Cranbury, NJ (US);
Taiwan Semiconductor Manufacturing Co., Ltd., Hsin-Chu, TW;
Abstract
Methods and apparatuses for time to digital conversion (TDC) are disclosed. A timing circuit comprises a TDC circuit, a calibration module, and a correction module. The TDC circuit is configured to provide a timing signal indicative of a timing difference between edges of a periodic reference clock signal and a variable feedback signal. The TDC circuit is also configured to provide a delay signal that is variably delayed relative to the reference clock signal. The calibration module is configured to provide a calibration signal to increase and decrease a total delay of the TDC circuit based on a time delay of the calibration signal plus a time delay of a correction signal. The correction module, which is configured to receive the timing signal and provide the correction signal, minimizes harmonic spurs in a frequency response of the timing signal by operating at a frequency of the reference clock signal.