Pulse or digital communications – Transmitters
Reexamination Certificate
2008-07-29
2008-07-29
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Transmitters
Reexamination Certificate
active
10343356
ABSTRACT:
A method for digital transmission using an AM transmitter includes operating an output stage of the AM transmitter in a linear mode and correcting the supply voltage of the output stage in the linear mode as a function of an instantaneous drive so as to improve efficiency. The correcting is performed by operating the modulator of the AM transmitter as a switched-mode power supply unit so as to deliver a corrected supply voltage to the output stage, and scanning an envelope of a complex modulated data signal so as to control the correcting. A time constant during the scanning of the envelope enables immediate following of a rise in the envelope. The complex modulated data signal is delayed after the scanning so as to perform the correcting during the delay and prevent an overdriving of the output stage.
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International Search Report for International No. PCT/DE02/01314 mailed on May 7, 2003.
Ahn Sam K
Darby & Darby
Deutsche Telekom AG
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