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:
Nov. 17, 2009
Filed:
Jun. 10, 2008
Shuichi Takada, Yokohama, JP;
Takeshi Abiru, Yokohama, JP;
Shuichi Takada, Yokohama, JP;
Takeshi Abiru, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A resistance adjusting circuit including a semiconductor integrated circuit includes a reference voltage generating circuit which generates a reference voltage corresponding to a resistance of an external resistor element connected to the semiconductor integrated circuit, a comparison voltage generating circuit which comprises a replica resistor circuit whose resistance is adjusted according to a resistance control signal and generates a comparison voltage corresponding to a resistance of the replica resistor circuit, a main body resistor circuit which has substantially the same configuration as that of the replica resistor circuit and whose resistance is adjusted according to the resistance control signal, and a control signal generating circuit which receives the reference and comparison voltages and converts the voltages to frequency signals corresponding to the voltages, integrates the frequency signals to produce integration data of the frequency signals, and generates the resistance control signal based upon a difference between the integration data.