CANCELLATION CIRCUIT USING DIGITAL TO TIME CONVERTER

A cancellation circuit includes a limiter connected to an output of a first transmitter power amplifier that converts in input sinewave to a digital square wave and a digital to time converter (DTC) connected to the limiter. A RF digital to RF converter is connected to the DTC that converts the digi...

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Bibliographische Detailangaben
Hauptverfasser:	Narravula, Sridhar Reddy, Razzaghi, Alireza, Lau, Wai, Liu, Tian, Wong, Alden C, Tam, Sai-Wang, Carnu, Ovidiu, Srinivasa, Sudhir, Lin, Yui
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HOROLOGY PHYSICS TIME-INTERVAL MEASURING TRANSMISSION
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Beschreibung
Zusammenfassung:	A cancellation circuit includes a limiter connected to an output of a first transmitter power amplifier that converts in input sinewave to a digital square wave and a digital to time converter (DTC) connected to the limiter. A RF digital to RF converter is connected to the DTC that converts the digital square wave input into an analog RF output. A cancellation amplifier with an input receives an output from the RF digital to RF converter and has an output connected to an output of a second transmitter power amplifier. The cancellation amplifier produces a cancellation signal to cancel an interference signal at the output of the second transmitter power amplifier from the output of the first transmitter power amplifier. A power detector is connected to the output of the second power amplifier that produces a power value detected at the output of the second power amplifier.