Multi-level power amplifying circuitry for portable radio transc

Details Multi-level power amplifying circuitry for portable radio transc Multi-level power amplifying circuitry for portable radio transc

1985-11-01

1987-01-13

Mullins, James B.

Amplifiers

With control of power supply or bias voltage

330202, 330297, 455 89, 455 99, 455127, H03F 3189

Patent

active

046367411

ABSTRACT:
Unique multi-level power amplifying circuitry is described that may be advantageously utilized in duplex portable radio transceivers which may be inserted into a vehicular adaptor for operation from the vehicle battery. Upon detecting the presence of the vehicular adaptor, the power amplifier may be operated at a second set of power levels which include levels greater than a first set of power levels for portable operation. The multi-level power amplifying circuitry of the present invention may be advantageously utilized in a variety of applications where duplex battery-operated radio transceivers may be inserted into a vehicular adaptor for operation from the vehicle battery.

REFERENCES:
patent: 3065424 (1962-11-01), Whisenhunt
patent: 4307455 (1981-12-01), Juhasz et al.
patent: 4414623 (1983-11-01), Davis et al.
patent: 4455623 (1984-06-01), Wesemeyer et al.
patent: 4510460 (1985-04-01), Tamura
patent: 4523155 (1985-06-01), Walczak et al.

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