Balanced power amplifier and high-frequency communication...

Details Balanced power amplifier and high-frequency communication... Balanced power amplifier and high-frequency communication...

2006-06-06

2006-06-06

Nguyen, Khanh V. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S12400D, C330S295000, C330S301000

Reexamination Certificate

active

07057458

ABSTRACT:
A balanced power amplifier includes grounded-emitter first and second bipolar transistors that are disposed in parallel, first and second variable impedance elements with each one end being electrically connected to each base of the first and second bipolar transistors, a regulator circuit disposed between the other end of the first variable impedance element and the other end of the second variable impedance element, a first resistance for electrically connecting the line between the first variable impedance element and the regulator circuit and a voltage source, and a second resistance for electrically connecting the line between the second variable impedance element and the regulator circuit and the voltage source. The balanced power amplifier is small in the number of component parts and in size.

REFERENCES:
patent: 6201445 (2001-03-01), Morimoto et al.
patent: 6545542 (2003-04-01), Matsuyoshi et al.
patent: 2001-094360 (2001-04-01), None
patent: 2001-267857 (2001-09-01), None

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