Impedance matching circuit and impedance matching system...

Details Impedance matching circuit and impedance matching system... Impedance matching circuit and impedance matching system...

2011-01-11

2011-01-11

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Automatically controlled systems

Impedance matching

C333S032000

Reexamination Certificate

active

07868713

ABSTRACT:
An exemplary impedance matching circuit (20) includes a signal processing circuit (22) and a variable resistance unit (24). The signal processing unit is configured for identifying a frequency of a signal from an external transmission line (23), generating an identification signal according to the frequency. The variable resistance unit is configured for selecting a resistance matched with an actual impedance of the transmission line.

REFERENCES:
patent: 7068065 (2006-06-01), Nasrullah
patent: 7323901 (2008-01-01), Aoyama et al.
patent: 7332980 (2008-02-01), Zhu et al.
patent: 2005/0140424 (2005-06-01), Uematsu
patent: 2008/0123771 (2008-05-01), Cranford et al.
patent: 1578143 (2005-02-01), None
patent: 1638279 (2005-07-01), None

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