Transmitter circuit

Details Transmitter circuit Transmitter circuit

1989-12-21

1991-07-02

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including gain control means

330277, 455127, H03G 330

Patent

active

050292986

ABSTRACT:
A transmitter circuit useful for example, in a portable radio-telephone comprises a power amplifying circuit which includes a driving amplifier constituted by a Si-MOSFET element and a power amplifier constituted by a GaAs-FET element. The gate voltage control is performed simultaneously for the driving amplifier and the power amplifier. By virtue of this mixed arrangement, a transmitting power amplifying circuit having a high power conversion efficiency is realized inexpensively.

REFERENCES:
patent: 3866136 (1975-02-01), Augustin et al.
patent: 4523155 (1985-06-01), Walczak et al.

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