Apparatus for switching matching circuit in mobile...

Details Apparatus for switching matching circuit in mobile... Apparatus for switching matching circuit in mobile...

2006-02-14

2006-02-14

Nguyen, Simon (Department: 2685)

Amplifiers

With control of power supply or bias voltage

C455S127100, C455S550100, C333S124000, C333S017300, C330S135000

Reexamination Certificate

active

06998915

ABSTRACT:
An apparatus for switching a matching circuit in a mobile communication terminal includes a PIN diode connected in parallel to an RF signal input and output line to be turned on and off to connect and disconnect an impedance matching-element to the RF signal input and output line in accordance with a frequency band switching-signal, and a bias circuit for generating a bias voltage applied to the PIN diode in accordance with the frequency band switching-signal, thereby shifting an amplitude of an RF signal to a positive side at an off-time of the PIN diode.

REFERENCES:
patent: 5054114 (1991-10-01), Erickson
patent: 5661438 (1997-08-01), Sasaki
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patent: 6795714 (2004-09-01), Fickenscher et al.
patent: 2001/0046880 (2001-11-01), Hosonuma
patent: 2002/0044016 (2002-04-01), Hareyama
patent: 2002/0118076 (2002-08-01), Sharpe et al.
patent: H5-37255 (1993-02-01), None
patent: H10-117109 (1998-05-01), None
patent: P2001-77719 (2001-03-01), None

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