Telecommunications – Transmitter – With feedback of modulated output signal
Reexamination Certificate
2008-04-01
2008-04-01
Le, Lana (Department: 2618)
Telecommunications
Transmitter
With feedback of modulated output signal
C455S127100, C455S108000, C455S116000
Reexamination Certificate
active
10790911
ABSTRACT:
A radio frequency output power control system for use in communication systems is disclosed. The power control system is used for a modulation scheme having a non-constant amplitude envelope and comprises a power amplifier having a power amplifier input for receiving an input signal with a non-constant amplitude envelope, a power control input for receiving a power control input, and a power amplifier output for providing an amplified output signal. The power control system also includes a track and hold circuit for tracking a measured reference power signal that is representative of a modulation of the input signal, and subtraction means for subtracting an output of the track and hold circuit from the measured reference power signal to provide a difference signal that is coupled to the power control input.
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Gels Robert G.
Nandipaku Sanjay
Analog Devices Inc.
Gauthier & Connors LLP
Le Lana
LandOfFree
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