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:
Sep. 01, 2009
Filed:
Apr. 27, 2006
Osamu Watanabe, Kanagawa, JP;
Rui Ito, Kanagawa, JP;
Shigehito Saigusa, Kanagawa, JP;
Tetsuro Itakura, Tokyo, JP;
Osamu Watanabe, Kanagawa, JP;
Rui Ito, Kanagawa, JP;
Shigehito Saigusa, Kanagawa, JP;
Tetsuro Itakura, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A time constant automatic adjusting circuit comprises: a filter circuit varying a phase of an clock signal to be input so as to output the clock signal; a phase comparison circuit comparing a phase of an output signal of the filter circuit with the phase of the clock signal, and outputting a predetermined voltage when the phase of the output signal and the phase of the clock signal are the same; at least three comparators comparing the output voltage with a plurality of different voltages; an up-down counter counting a number of output bits of either one of the at least three different voltages in accordance with an output result of the comparators; and a control circuit varying the time constant of the filter circuit in accordance with the number of output bits counted by the up-down counter.