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:
Apr. 13, 2010
Filed:
Feb. 29, 2008
Tetsuhiro Koyama, Kanagawa, JP;
Tetsuhiro Koyama, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
According to one aspect of the present invention, there is provided a dither circuit including a dither generating circuit generating a plurality of complementary signal pairs, and a dither input circuit generating a plurality of dither signals from the plurality of complementary signal pairs to add the generated dither signals to an analog input signal, in which the plurality of complementary signal pairs have different frequencies with each other, the dither input circuit includes capacitors provided for each of the plurality of complementary signal pairs and a plurality of switch pairs including first and second switches having one terminals connected to each one terminal of the capacitors, and the other terminals of the capacitors are connected to an adding point to the analog input signal, the first switch supplies ones of the complementary signal pairs to one terminals of the capacitors when a clock signal is in effective state, and the second switch supplies the others of the complementary signal pairs to one terminals of the capacitors when an inverting clock signal of the clock signal is in effective state.