Pre-matching of distributed and push-pull power transistors

Details Pre-matching of distributed and push-pull power transistors Pre-matching of distributed and push-pull power transistors

2007-09-11

2007-09-11

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

C330S286000

Reexamination Certificate

active

11265991

ABSTRACT:
Pre-matching of distributed push-pull and power transistors enabling the effective use of high-power and high-frequency transistor arrays. In accordance with the invention, a pre-matching element is connected between stages of multi-transistor arrays. The pre-matching element serves to transform the impedance at a connecting point between stages toward an impedance level that is less sensitive to transmission line losses. In one embodiment of the invention the pre-matching element is a shunt inductor.

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patent: 5920230 (1999-07-01), Beall
patent: 6646321 (2003-11-01), Roodnat
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patent: 2004/0061214 (2004-04-01), Crescenzi, Jr.
Becciolini, B., “Motorola Semiconductor Application Note AN721—Impedance Matching Networks Applied to RF Power Transistors”, Sep. 23, 1993, pp. 1-15.
“Dallas Semiconductor/Maxim Application Note 742—Impedance Matching and the Smith Chart: The Fundamentals”, Mar. 23, 2001, pp. 1-16.

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