Wave transmission lines and networks – Automatically controlled systems – Impedance matching
Reexamination Certificate
2007-01-30
2007-01-30
Jones, Stephen E. (Department: 2817)
Wave transmission lines and networks
Automatically controlled systems
Impedance matching
Reexamination Certificate
active
11111087
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.
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Lee An-Ming
Lee Chao-Cheng
Jones Stephen E.
Rabin & Berdo P.C.
Realtek Semiconductor Corp.
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