Digital broadcast receiving apparatus
US7302021B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2001 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | May 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.