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:
Jun. 13, 2006
Filed:
Dec. 14, 2004
Koji Sushihara, Ikoma, JP;
Takashi Morie, Ibaraki, JP;
Koji Sushihara, Ikoma, JP;
Takashi Morie, Ibaraki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a flash A/D converter including a plurality of differential amplifier circuits and a plurality of voltage comparator circuits, a regulator circuit is provided. The regulator circuit automatically regulates a bias voltage of each of the plurality of differential amplifier circuits in a differential amplifier circuit array to make an output dynamic range for the differential amplifier circuits match an input dynamic range for the plurality of voltage comparator circuits. Therefore, even if the input dynamic range for the voltage comparator circuits is narrowed with reduction in a power supply voltage, the output dynamic range for the differential amplifier circuits and the input dynamic range for the voltage comparator circuits match, thus resulting in a high A/D conversion accuracy.