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.

Date of Patent:
Sep. 16, 2014

Filed:

Aug. 28, 2013
Applicant:

Fujitsu Limited, Kawasaki, JP;

Inventor:

Takumi Danjo, Kawasaki, JP;

Assignee:

Fujitsu Limited, Kawasaki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 5/24 (2006.01); H03K 3/0233 (2006.01); H03M 1/36 (2006.01);
U.S. Cl.
CPC ...
H03K 3/0233 (2013.01); H03M 1/361 (2013.01); H03K 5/2445 (2013.01);
Abstract

A comparator includes: a differential amplifier of which operational state is switched in response to a clock-signal, and which outputs a first intermediate-output corresponding to a first input-signal and a second intermediate-output corresponding to a second input-signal; a differential latch circuit of which operational state is switched in response to the clock-signal, and a state of which is changed depending on the first intermediate-output and the second intermediate-output; a first adjuster configured to adjust a threshold of the differential latch circuit with respect to a change of a state of the first intermediate-output and a change of a state of the second intermediate-output; and a second adjuster configured to adjust a threshold variation of the differential latch circuit with respect to a change of a state of the first intermediate-output and a change of a state of the second intermediate-output.


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