High-level modulator with bipolar modulation reference

Details High-level modulator with bipolar modulation reference High-level modulator with bipolar modulation reference

1994-02-10

1995-06-13

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

330127, 330285, 455126, 455127, H03G 320

Patent

active

054246857

ABSTRACT:
A bipolar modulator and its associated control devices for use with a high-efficiency amplifier in an RF transmitter. The modulator receives an inverted reference signal that has passed through at least two comparators. The modulator output is filtered and then rectified and coupled to a high-efficiency power amplifier.

REFERENCES:
patent: 4631491 (1986-12-01), Smithers
patent: 4933986 (1990-06-01), Leitch
patent: 4994757 (1991-02-01), Bickley et al.
patent: 5023937 (1991-06-01), Opas
patent: 5111158 (1992-05-01), Malec et al.
patent: 5119040 (1992-06-01), Long et al.
patent: 5121077 (1992-06-01), McGann
patent: 5124665 (1992-06-01), McGann

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