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. 05, 2013
Filed:
Jun. 29, 2012
Chien Chen Chen, San Jose, CA (US);
Yuanheng Lo, San Jose, CA (US);
Pavan Kumar Alli, Sunnyvale, CA (US);
Yongchou Lo, Cupertino, CA (US);
Minhui Yan, San Jose, CA (US);
Harmeet Bhugra, San Jose, CA (US);
Chien Chen Chen, San Jose, CA (US);
YuanHeng Lo, San Jose, CA (US);
Pavan Kumar Alli, Sunnyvale, CA (US);
Yongchou Lo, Cupertino, CA (US);
Minhui Yan, San Jose, CA (US);
Harmeet Bhugra, San Jose, CA (US);
Integrated Device Technology, Inc., San Jose, CA (US);
Abstract
A frequency synthesizer is configured to generate a periodic output signal in response to a periodic input signal and a temperature-dependent frequency adjusting control signal. A temperature sensor is provided, which is configured to generate a temperature measurement signal in response to detecting a temperature of at least a portion of the frequency synthesizer. A control circuit is provided, which is configured to generate the temperature-dependent frequency adjusting control signal in response to the temperature measurement signal. This control circuit includes a cascaded arrangement of an oversampled data converter and a multi-stage digital filter, which is configured to generate a plurality of codes from respective ones of the digital filter stages, and a selection circuit, which is configured to use at least first and second ones of the plurality of codes in sequence during first and second consecutive time intervals to generate the temperature-dependent frequency adjusting control signal.