Designing methods and circuits for impedance matching

Details Designing methods and circuits for impedance matching Designing methods and circuits for impedance matching

2005-06-14

2005-06-14

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

With impedance matching

C333S017300, C330S302000, C330S311000

Reexamination Certificate

active

06906599

ABSTRACT:
The designing methods for an impedance matching are provided which include steps of: connecting in parallel a capacitor to a collector/drain of a bipolar/field effect transistor having a common-emitter configuration, and obtaining a desired resistance at a base/gate of the bipolar/field effect transistor due to a feedback effect for achieving the impedance matching. The circuits for an impedance matching are also provided which include: a first bipolar/field effect transistor, an inductor, a first resistor, a power supply, a capacitor, a second bipolar/field effect transistor, a second resistor, and a third resistor, wherein a desired resistance is produced in the input impedance looking into the base/gate of the first bipolar/field effect transistor through an equivalent parallel combination of an capacitor and an resistor produced at the base/gate of the second bipolar/field effect transistor so as to achieve the impedance matching.

REFERENCES:
patent: 5973575 (1999-10-01), Kamogawa et al.
patent: 6130589 (2000-10-01), Yamaguchi et al.
patent: 6441689 (2002-08-01), Joseph
patent: 6603351 (2003-08-01), Suzuki
patent: 6628176 (2003-09-01), Okada
patent: 6653905 (2003-11-01), Ishibayashi

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