Multi-level power amplifying circuitry for portable radio...

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

H - Electricity

04

B

325/53, 325/70

H04B 1/04 (2006.01) H03F 1/02 (2006.01) H04B 1/38 (2006.01)

Patent

CA 1264067

Abstract Unique multi-level power amplifying circuitry (120, 122, 140, 150) is described that may be advantageously utilized in duplex portable radio transceivers (100) which may be inserted into a vehicular adaptor (180) for operation from the vehicle battery (182). Upon detecting (204) the presence of the vehicular adaptor (180), the power amplifier (122) may be operated at a second set of power levels (208) which include levels greater than a first set of power levels (212) 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.

519045

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