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:
Mar. 25, 2014
Filed:
Jun. 27, 2012
Takao Marukame, Tokyo, JP;
Tetsufumi Tanamoto, Kanagawa, JP;
Atsuhiro Kinoshita, Kanagawa, JP;
Tomoaki Inokuchi, Kanagawa, JP;
Masamichi Suzuki, Tokyo, JP;
Yoshiaki Saito, Kanagawa, JP;
Takao Marukame, Tokyo, JP;
Tetsufumi Tanamoto, Kanagawa, JP;
Atsuhiro Kinoshita, Kanagawa, JP;
Tomoaki Inokuchi, Kanagawa, JP;
Masamichi Suzuki, Tokyo, JP;
Yoshiaki Saito, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to an embodiment, an analog-to-digital converter includes a voltage generating unit to generate comparative voltages; and comparators. Each comparator compares any one of the comparative voltages with an analog input voltage and output a digital signal. Each comparator includes a differential pair circuit to detect a potential difference between two inputs. The differential pair circuit includes first and second circuit portions. The first circuit portion includes a first transistor having a gate to which one input is supplied; and a resistor connected in series with the first transistor. The second circuit portion includes a second transistor having a gate to which the other input is supplied and forms a differential pair with the first transistor; and a variable resistor connected in series with the second transistor. The variable resistor includes variable resistive elements each having a resistance value variably set according to a control signal.