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. 21, 2003
Filed:
Apr. 19, 2002
Yukio Okazaki, Kanagawa, JP;
Hisaya Ishihara, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
There is disclosed a phase shifter using a polyphase filter, which achieves a broad band, suppresses errors in both amplitude and phase, and achieves low power consumption. A driving section includes a voltage-to-current conversion circuit for converting a voltage value of an input signal Si into a current value, and outputting an input current signal Ci. An RC polyphase filter outputs a corresponding polyphase phase-shifted current signal Co according to supplying of the input current signal Ci. A load circuit includes a polyphase current-to-voltage conversion circuit for converting a current value of the polyphase phase-shifted current signal Co into a voltage value, and outputting an output signal Vo.