CANCELLATION CIRCUIT USING DIGITAL TO TIME CONVERTER

Organization Name

NXP USA, Inc.

Inventor(s)

Sai-Wang Tam of Sunnyvale CA (US)

Tian Liu of Los Angeles CA (US)

Alireza Razzaghi of Mountain View CA (US)

Alden C. Wong of Sunnyvale CA (US)

Ovidiu Carnu of Scotts Valley CA (US)

Wai Lau of San Jose CA (US)

Sridhar Reddy Narravula of Cupertino CA (US)

Yui Lin of Palo Alto CA (US)

Sudhir Srinivasa of Los Gatos CA (US)

CANCELLATION CIRCUIT USING DIGITAL TO TIME CONVERTER - A simplified explanation of the abstract

This abstract first appeared for US patent application 18296759 titled 'CANCELLATION CIRCUIT USING DIGITAL TO TIME CONVERTER

The cancellation circuit described in the patent application consists of several components working together to cancel interference signals.

Limiter connected to the output of a first transmitter power amplifier converts an input sinewave to a digital square wave.
Digital to time converter (DTC) connected to the limiter processes the digital signal.
RF digital to RF converter connected to the DTC converts the digital square wave input into an analog RF output.
Cancellation amplifier receives the output from the RF digital to RF converter and produces a cancellation signal.
Power detector connected to the output of the second power amplifier detects the power value at the output.

Potential Applications: - Wireless communication systems - Signal processing technologies - Interference cancellation in transmitters

Problems Solved: - Interference signals affecting the output of transmitter power amplifiers - Ensuring signal quality in wireless communication systems

Benefits: - Improved signal quality - Enhanced performance of wireless communication systems - Reduction of interference in transmitter outputs

Commercial Applications: Title: Advanced Interference Cancellation Technology for Wireless Communication Systems This technology can be utilized in telecommunications companies, military communications, and satellite communication systems to enhance signal quality and reduce interference.

Questions about the technology: 1. How does the cancellation circuit improve the performance of wireless communication systems? - The cancellation circuit cancels interference signals at the output of transmitter power amplifiers, leading to improved signal quality and reduced interference in wireless communication systems.

2. What are the key components of the cancellation circuit and how do they work together? - The limiter, DTC, RF digital to RF converter, cancellation amplifier, and power detector work together to convert, process, and cancel interference signals in the transmitter output.

Original Abstract Submitted

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.