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. 30, 2009
Filed:
Nov. 12, 2004
Hideo Nunokawa, Kawasaki, JP;
Tatsuo Kato, Kawasaki, JP;
Miki Suzuki, Kawasaki, JP;
Tomonari Morishita, Kawasaki, JP;
Hideo Nunokawa, Kawasaki, JP;
Tatsuo Kato, Kawasaki, JP;
Miki Suzuki, Kawasaki, JP;
Tomonari Morishita, Kawasaki, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
Even when, for example, electric charge is injected into the output transistor due to external factor such as a noise from the outside, to prevent the step-down voltage from rising, the step-down circuit is comprised of an N channel type output transistor which controls the voltage at the control end, a booster, which is connected to the control end of the output transistor and raises the voltage at the control end and a discharge circuit, which discharges the electric charge at the control end of the output transistor so that the power supply voltage inputted from the input end is stepped down to a desired step-down voltage and outputted from the output end.