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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.:

US 9490808 B1

PDFFull Text
Date of Patent:
Nov. 08, 2016

Filed:

Oct. 29, 2015

Sensing circuit

Applicant:

Mediatek Inc., Hsin-Chu, TW;

Inventors:

Bo-Jr Huang, Hsinchu, TW;

Jia-Wei Fang, Hsinchu, TW;

Assignee:

MEDIATEK INC., Hsin-Chu, TW;

Attorney:

McClure, Qualey & Rodack, LLP

Primary Examiner:

Daniel Puentes

Int. Cl.
CPC ...
H03K 17/296 (2006.01); H03K 19/003 (2006.01); H03K 5/14 (2014.01); G06F 1/24 (2006.01); H03K 17/22 (2006.01); H03K 19/20 (2006.01);
U.S. Cl.
CPC ...
H03K 19/00361 (2013.01); G06F 1/24 (2013.01); H03K 5/14 (2013.01); H03K 17/223 (2013.01); H03K 19/20 (2013.01);
Abstract

A sensing circuit includes a delay chain and a decoder. The delay chain includes at least one delay unit, at least one cascading switch, and at least one feedback switch. The delay unit generates a delay signal according to an input signal and a reset signal. The cascading switch selectively passes the delay signal according to a control signal. The feedback switch selectively forms a feedback path of the delay unit according to the control signal. The decoder generates an output signal according to the delay signal. The delay unit is supplied by a work voltage. If the work voltage has noise, the noise will be detectable by analyzing the output signal of the decoder.

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