Method and apparatus for leveling an increasing or...

Details Method and apparatus for leveling an increasing or... Method and apparatus for leveling an increasing or...

2007-03-30

2010-06-08

Nguyen, Tony T (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S127200, C455S323000, C330S254000, C330S278000

Reexamination Certificate

active

07734268

ABSTRACT:
A method and an apparatus for leveling an increasing or decreasing slope of an AM modulated receiving signal attenuate the AM modulated receiving signal with an attenuation curve with a stepwise slope corresponding to the increasing or decreasing slope of said AM modulated receiving signal, filters the attenuated AM modulated receiving signal within AM-demodulation with a lowpass infinite-impulse-response filter of at least second order and increases the level of each delay-unit's output signal of the infinite-impulse-response filter each time a step in the attenuated AM modulated receiving signal arrives at the input of said infinite-impulse-response filter.

REFERENCES:
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patent: 6684065 (2004-01-01), Bult et al.
patent: 6744320 (2004-06-01), Nguyen et al.
patent: 7106388 (2006-09-01), Vorenkamp et al.
patent: 2003/0114126 (2003-06-01), Wang et al.
patent: 2003/0219085 (2003-11-01), Endres et al.
patent: 196 10 455 (1997-10-01), None
patent: 199 37 199 (2001-02-01), None
patent: WO 2004/038953 (2004-05-01), None
European Search Report for Application No. 06009866.2, dated Oct. 27, 2006.

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