Title:
マルチプルフィードバックソースを使用した自動利得制御機能を提供する方法及び装置
Document Type and Number:
Japanese Patent JP2007532013
Kind Code:
A
Abstract:
An apparatus (20) such as a television signal receiver provides an AGC function by using multiple feedback sources which provide both narrow band and wide band AGC signals in an adaptive manner. According to an exemplary embodiment, the apparatus (20) includes a tuner (10, 15, 20, 25, 30) operative to generate first and second IF signals. A first demodulator (40) is operative to generate a first AGC signal responsive to the first IF signal. A second demodulator (50) is operative to generate a second AGC signal responsive to the second IF signal. A wide band AGC detector (60) is operative to generate a third AGC signal responsive to at least one of the first and second IF signals. A switch (70) is operative to selectively provide one of the first, second and third AGC signals to the tuner (10, 15, 20, 25, 30) responsive to a predetermined condition.
Inventors:
Hutchinson, daniel, mark
Ekofu, Clint, Alan
Grabs, gary, dean
Mayer, Matthew, Thomas
Ekofu, Clint, Alan
Grabs, gary, dean
Mayer, Matthew, Thomas
Application Number:
JP2006520218A
Publication Date:
November 08, 2007
Filing Date:
July 08, 2004
Export Citation:
Assignee:
Thomson Licensing
International Classes:
H04N5/52; H03G3/30; H04N5/44; H04N5/46
Domestic Patent References:
| JPH08181556A | 1996-07-12 | |||
| JPH1198426A | 1999-04-09 | |||
| JP2001127732A | 2001-05-11 | |||
| JPH0522175A | 1993-01-29 | |||
| JPH1174866A | 1999-03-16 | |||
| JPH11261922A | 1999-09-24 | |||
| JP2002026756A | 2002-01-25 | |||
| JPH0730824A | 1995-01-31 | |||
| JP2000174829A | 2000-06-23 |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito