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:
Nov. 27, 2007
Filed:
Jun. 12, 2001
Takaaki Konishi, Ibaraki, JP;
Hiroshi Azakami, Ibaraki, JP;
Kazuya Ueda, Hirakata, JP;
Naoya Tokunaga, Moriguchi, JP;
Takaaki Konishi, Ibaraki, JP;
Hiroshi Azakami, Ibaraki, JP;
Kazuya Ueda, Hirakata, JP;
Naoya Tokunaga, Moriguchi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-Fu, JP;
Abstract
In a digital broadcast receiving apparatus for amplifying a received modulated digital signal wave with automatically adjusted gain and demodulating the modulated signal wave to a digital signal, a tuner frequency-converts the modulated digital signal wave to generate a first modulated signal. A first automatic gain control amplification unit controls gain of the tuner to make a level of the first modulated signal at a first predetermined level. An A/D converter converts the first modulated signal into a second modulated signal. A demodulator demodulates the second modulated signal to generate a first demodulated digital signal. A second automatic gain control amplifier generates a second demodulated digital signal where frequency fluctuations included in the digital modulated wave are eliminated.