04636741 is referenced by 106 patents and cites 6 patents.

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.

Title
Multi-level power amplifying circuitry for portable radio transceivers
Application Number
6/794026
Publication Number
4636741
Application Date
November 1, 1985
Publication Date
January 13, 1987
Inventor
James E Mitzlaff
Carpentersville
IL, US
Agent
Rolland R Hackbart
Assignee
Motorola
IL, US
IPC
H03F 3/189
View Original Source