Output networks in combination with LINC technique

Details Output networks in combination with LINC technique Output networks in combination with LINC technique

2011-03-08

2011-03-08

Choe, Henry K (Department: 2817)

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

C330S295000

Reexamination Certificate

active

07902921

ABSTRACT:
The present invention relates to balanced power amplifier network in combination with outphasing techniques such as Chireix. The object of the present invention is to provide a solution to the problem to combine balanced amplifiers like the current mode class D (CMCD) or class E/F with a LINC network. The main problem is that some power amplifiers have balanced output and the LINC network is single-ended so that a high power low loss transformer that works at several impedance levels is needed, which is hard to realize at cellular frequencies.

REFERENCES:
patent: 5025225 (1991-06-01), Tajima et al.
patent: 7332960 (2008-02-01), Burns et al.
patent: 7358806 (2008-04-01), Burns et al.
patent: 2006/0006934 (2006-01-01), Burns et al.
patent: H11-017466 (1999-01-01), None
patent: 2001-053520 (2001-02-01), None
U.S. Appl. No. 12/297,994, filed Apr. 23, 2009, All references in parent application.

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