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:
Jul. 21, 2009
Filed:
Dec. 04, 2006
Joo Yul Ko, Kyungki-do, KR;
Hak Sun Kim, Daejeon, KR;
Won Tae Choi, Kyungki-do, KR;
Won Wook SO, Kyungki-do, KR;
Joo Yul Ko, Kyungki-do, KR;
Hak Sun Kim, Daejeon, KR;
Won Tae Choi, Kyungki-do, KR;
Won Wook So, Kyungki-do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, Kyungki-Do, KR;
Abstract
In a clock noise canceling circuit, a coupler extracts a signal from a clock signal. A filter selects a harmonic component of a preset frequency in the extraction signal from the coupler. A phase shifter phase inverts the harmonic component of the preset frequency from the filter. An AGC amplifier amplifies the phase-inverted harmonic component from the phase shifter. Also, a combiner combines the amplified component from the phase shifter with the clock signal to eliminate the harmonic component of the preset frequency from the clock signal. A power detector detects a power level of the harmonic component of the preset frequency in an output signal of the combiner. Additionally, a controller controls gain of the automatic gain control amplifier based on the power level of the harmonic component detected by the power detector, thereby canceling noises.