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:
Aug. 03, 2010
Filed:
Jul. 26, 2007
Yusuke Aiba, Tokyo, JP;
Yusuke Aiba, Tokyo, JP;
Asahi Kasei Emd Corporation, Tokyo, JP;
Abstract
An embodiment of the present invention has a differential pair including a first and second MOS transistors having their sources grounded; a third and fourth transistor with their source terminals connected to drain terminals of the first and second transistors, respectively; a voltage generating circuit for outputting tuning and common voltage so that the ratio between the common and tuning voltage is constant; and a differential pair input voltage generating circuit that receives the input and common voltage to output voltages Vip and Vin to gate terminals of the first and second transistors, respectively. The gate terminal of the fourth transistor is connected to the gate terminal of the third transistor, and the tuning voltage is input to the two terminals.