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:
Dec. 09, 2003
Filed:
May. 31, 2000
Hiroaki Asada, Takatsuki, JP;
Joji Nakane, Nara, JP;
Tatsumi Sumi, Takatsuki, JP;
Taketoshi Matsuura, Takatsuki, JP;
Atsuo Inoue, Kyoto-fu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
A semiconductor integrated circuit which obtains a driving power from a carrier onto which data has been piggybacked, the semiconductor integrated circuit being characterized by demodulating data by correctly discriminating it even when the obtained power supply voltage has become overvoltage, and characterized by effectively using the power supplied by the carrier. The semiconductor integrated circuit includes: a two-voltage rectifier circuit as a power source circuit ; a voltage regulator circuit which exercises a control so that a power with a higher voltage (VDDH) used for demodulating data does not exceed a certain voltage value; a resistor ; and a capacitor . With this construction, the voltage input to a regulator circuit as the reference voltage changes in correspondence to the change in voltage VDDH which is caused by the change in amplitude.