| US 7,539,469 B2 | ||
| Input control system for high frequency receiver | ||
| Michael Zahm, Waldbronn (Germany); Achim Ratzel, Karlsbad-Spielberg (Germany); and Stefan Köhler, Keltern (Germany) | ||
| Assigned to Harman Becker Automotive Systems GmbH, (Germany) | ||
| Filed on Dec. 09, 2005, as Appl. No. 11/299,314. | ||
| Claims priority of application No. 04029226 (EP), filed on Dec. 09, 2004. | ||
| Prior Publication US 2006/0154629 A1, Jul. 13, 2006 | ||
| Int. Cl. H04H 1/00 (2006.01); H04B 17/02 (2006.01) | ||
| U.S. Cl. 455—130 [455/3.02; 455/136; 455/232.1] | 21 Claims |
| 1. A receiver comprising:
an input stage that receives and amplifies a broadcast signal including a digital broadcast signal and an analog broadcast
signal;
a digital signal processing stage that processes a received digital broadcast signal and outputs a first quality information
signal,
an analog signal processing stage that processes a received analog broadcast signal and outputs a second quality information
signal,
an evaluation unit that evaluates at least one of the first and second quality information signals and outputs a control signal
to the input stage, the digital signal processing stage and the analog signal processing stage; and
a broadband level detector that detects a level of the received broadcast signal and outputs a first automatic gain control
signal to the evaluation unit, where the first automatic gain control signal corresponds to the level of the received broadcast
signal.
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