Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1998-04-15
2000-06-27
Bost, Dwayne D.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
H04Q 732
Patent
active
060817011
ABSTRACT:
In a portable apparatus in a digital cellular system in which transmission and reception is simultaneously conducted in a particularly wide variable output range, efficiency is improved in a low-power output operation and there is minimized the influence upon discontinuous output waveforms appearing in a gain changing operation. There are included a distributor to distribute an input signal to two paths, a first gain control amplifier, a linear power amplifier, a driver amplifier, a filter, a switching circuit to turn power of the linear power amplifier on and off, and a second gain control amplifier. Outputs from the linear power and gain control amplifiers are mixed with each other by a mixer. Gains of these amplifiers are separately controlled by a control circuit, which also controls on and off of the switching circuit.
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Japenese Office Action dated Oct. 26, 1999 issued in a related application.
English translation of relevant portions of Oct. 26, 1999 Japenese Office Action.
Bost Dwayne D.
Gelin Jean A.
NEC Corporation
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