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:
Oct. 31, 2006
Filed:
Nov. 29, 2004
Shinichi Watanabe, Tokyo, JP;
Shinichi Watanabe, Tokyo, JP;
Seiko NPC Corporation, , JP;
Abstract
A bias voltage generator circuit capable of keeping a constant electric current consumption (I) and supplying bias voltages (V, V) respectively kept at constant values relative to its source voltage (V) and GND potential even when Vfluctuates. The circuit includes: three p-channel transistors connected in a current mirror, each having a source connected to source voltage; and four n-channel transistors, each having a source connected to GND. Bias voltages Vand Vare in a relation such that they control each other. Concretely, the Vpotential starting to rise causes the Vpotential to start to decrease, and the Vpotential starting to decrease causes the Vpotential to start to rise. The circuit has the property of making the circuit current fixed regardless of V. Even when Vfluctuates, Iis constant and Vand Veach produce a fixed potential.