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:
Sep. 07, 1999
Filed:
Nov. 27, 1996
Makoto Hori, Yamatokooriyama, JP;
Kazuo Kitaura, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
There is provided a low-cost satellite broadcast tuner capable of receiving and processing both a QPSK modulation signal and an FM signal while assuring simple connection of an LNB (low noise block) to the tuner. A single front-end section including an RF stage, a mixer, a local oscillator circuit, an IF stage, an AGC loop is used for both an FM detector and an I/Q quadrature detector, so that both the FM signal and the QPSK modulation signal are received and processed in the single front-end section. In the above case, power supplied to the FM detector for detecting the FM signal, and power supplied to a local oscillator circuit required for detecting the QPSK modulation signal is turned off when receiving the FM signal.