Impedance matching circuit with automatic adjustment and...

Details Impedance matching circuit with automatic adjustment and... Impedance matching circuit with automatic adjustment and...

2005-06-28

2005-06-28

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Automatically controlled systems

Impedance matching

C333S032000, C327S362000, C326S030000

Reexamination Certificate

active

06911875

ABSTRACT:
The present invention discloses an impedance matching circuit with automatic adjustment and a method thereof. The impedance matching circuit comprises: a resistor, for receiving a reference voltage and generating a reference current; a detection unit, for detecting resistance variation and generating a plurality of comparison voltages according to said reference current; a comparison unit, for comparing said reference voltage with said comparison voltages, and generating a control signal; and a composite resistor unit, for receiving said control signal and generating a matched impedance. Therefore, a matched impedance value can be obtained within a designed range in despite of the manufacturing process and the operation environment.

REFERENCES:
patent: 6265917 (2001-07-01), Main et al.
patent: 6535047 (2003-03-01), Mughal et al.
patent: 6545522 (2003-04-01), Mughal et al.
patent: 6559475 (2003-05-01), Kim
patent: 6756858 (2004-06-01), Gonzalez et al.

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