Method for adjusting tuning circuit and receiver circuit

Details Method for adjusting tuning circuit and receiver circuit Method for adjusting tuning circuit and receiver circuit

2011-07-12

2011-07-12

Le, Nhan (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S192300, C455S333000

Reexamination Certificate

active

07979040

ABSTRACT:
Disclosed herein is a method for adjusting the tuning frequency of a tuning circuit, which is implemented as a parallel circuit of a coil and series circuits Ai each including a capacitor Ci and a switch device Qi (i=one to n, where n denotes an integer at least equal to two), by varying the tuning frequency through control to turn on and off the switch devices Qi in accordance with control data bi, the method for adjusting the tuning frequency of a tuning circuit including the steps of: finding control data bi for a desired tuning frequency from control data bi for a tuning frequency equal to a first frequency and control data bi for a tuning frequency equal to a second frequency; and applying the control data bi found for the desired tuning frequency to the switch devices Qi.

REFERENCES:
patent: 6349116 (2002-02-01), Hash et al.
patent: 2004/0137865 (2004-07-01), Callias et al.
patent: 63-240116 (1988-10-01), None
patent: 04-145728 (1992-05-01), None
patent: 10-065562 (1998-03-01), None
patent: 2003-037480 (2003-02-01), None
patent: 2005-130055 (2005-05-01), None
patent: 2006-080620 (2006-03-01), None
patent: 2006-287459 (2006-10-01), None
A Japanese Office Action dated Feb. 18, 2009 issued in connection with counterpart Japanese Patent Application No. 2007-025200.

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