Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-12-18
2007-12-18
Tran, Pablo N. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
Reexamination Certificate
active
10658478
ABSTRACT:
A tuner includes an RF input with a signal level controller such as an attenuator that is provided to attenuate a signal from the RF input. A tunable RF filter provides RF band limiting and determines simultaneously the AGC bandwidth. An amplifier with resistive feedback provides first and second outputs which, together, represent the incident power of the attenuated signal delivered by the amplifier, thus eliminating the need for a directional coupler and rendering this part of the tuner compatible with integration. A feedback circuit responds to the incident power of the attenuated signal by controlling the attenuation (AGC) provided by the signal level controller.
REFERENCES:
patent: 4320530 (1982-03-01), Ikeda
patent: 5697095 (1997-12-01), Matsuura
patent: 5950112 (1999-09-01), Hori et al.
patent: 6169912 (2001-01-01), Zuckerman
patent: 6389272 (2002-05-01), Horigome et al.
patent: 6400393 (2002-06-01), Limberg
patent: 6400416 (2002-06-01), Tomasz
patent: 6434374 (2002-08-01), Muterspaugh
patent: 6725463 (2004-04-01), Birleson
patent: 6826388 (2004-11-01), Tanaka et al.
patent: 6978125 (2005-12-01), Lindell et al.
patent: 6995610 (2006-02-01), Madni
patent: 2002/0131533 (2002-09-01), Koizumi
patent: 2003/0071925 (2003-04-01), Kanno et al.
Tran Pablo N.
Zenith Electronics Corporation
LandOfFree
Attenuation control for tuners does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Attenuation control for tuners, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Attenuation control for tuners will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3880351