Intel Corporation

Bae Systems Information and Electronic Systems Integration Inc.

Amod V Dandawate

Dale A Rickard

David A Haessig, Jr

Huaiyu Zeng

Xiao-Feng Qi

Robert T Carlson

Chunming Han

Qian C Xie

David C Donarski

Forrest C Vatter

An apparatus having an analog-to-digital converter with an increased effective resolution is disclosed. The apparatus includes a signal processing functional block and an analog-to-digital conversion block. The signal processing functional block includes a controller for providing a set of digital control signals according to a set of digital input signals received by the controller, a digital-to-analog converter for converting the digital control signals to a set of corresponding analog control signals, and a physical hardware unit for performing a specific function according to the analog control signals. The analog-to-digital conversion block includes an adder for adding a dither signal to an analog feedback signal originated from the physical hardware unit, an ADC for converting sums of dither signals and analog feedback signals to a set of oversampled digital control signals to be fed into the controller.

Method and apparatus for improving resolutions of analog-to-digital converters

The Quad Cell permits measurement of four quadrant signal powers simultaneously, metrics which are equal when the laser spot is at the desired zero location, at the center of the cell, the origin of the cells' axes. A control action acts upon the Quad Cell signals to move the laser spot toward the origin of the axes bisecting the four quadrants of the cell, moving the laser spot to the origin to achieve a null in the difference between these four signal levels.

Acquisition and pointing device, system, and method using quad cell

Techniques are provided for reducing the magnitude of echo tails in a near-end modem. The invention may use an echo tail canceller to generate a signal that cancels echo tail. One characteristic of the echo tail canceller may be determined during a time when only the near-end modem is scheduled to transmit signals. Another characteristic of the echo tail canceller may be determined at approximately the time that a body echo canceller has reached convergence and may be re-determined periodically thereafter. The near-end modem may subtract from any received signal an echo tail canceller signal generated by the echo tail canceller to cancel echo tail from the received signal.

Techniques to cancel echo tail

Various embodiments are described for an improved reflectometer and/or a modem or other device which may include an improved reflectometer. An apparatus may include a pulse transmitter to transmit a pulse to a line to be tested, a receiver adapted to receive a reflection of the transmitted pulse, and a zero-echo canceling system coupled to the transmitter and receiver. The zero-echo canceling system may be adapted to at least partially cancel a received zero-echo by generating a zero-echo canceling signal based on the transmitted pulse and to calculate an error signal as a difference between the zero-echo and the zero-echo canceling signal.

Reflectometer with echo canceller

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Basking Ridge, NJ, United States of America

Amod V Dandawate