Colin D Nayler

US Patent:

6438184, Aug 20, 2002

Filed:

Jan 12, 1999

Appl. No.:

09/228979

Inventors:

Colin Nayler - Sunnyvale CA

Assignee:

Sunnyvale Micro Devices, Inc. - Sunnyvale CA

International Classification:

H04L 2708

US Classification:

375345, 4552341

Abstract:

A physical layer transceiver of a home network station connected to a telephone medium has an architecture enabling adaptation of detection circuitry based on received network signals to enable reliable recovery of data signals. The physical layer transceiver includes an input amplifier that amplifies network signals according to one of three gain settings set by a receiver gain control signal. A signal conditioning circuit includes an envelope detector configured for outputting an envelope of the amplified received signal, and an energy detector configured for outputting an energy signal of the amplified received signals. The envelope signal and the energy signal are supplied to slicer threshold circuits, configured for outputting noise, peak, data event and energy event signals based on noise threshold, peak threshold, data transition threshold, and energy threshold signals, respectively. A digital controller controls the input amplifier gain and the threshold values, and adjusts the gain and threshold values based on the noise event signal and the peak event signal within an access ID (AID) interval. In particular, the digital controller adjusts the input amplifier gain during a first part of the AID interval, and adjusts the peak threshold and the data transition threshold during a second part of the AID interval by using the slicer threshold circuits for ternary searching of the peak of the detected envelope signal.

US Patent:

6532391, Mar 11, 2003

Filed:

Apr 20, 2000

Appl. No.:

09/552869

Inventors:

Colin D. Nayler - Sunnyvale CA

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

G05B 1302

US Classification:

700 37, 700 11, 700 34, 700 74, 341139, 375318, 375345

Abstract:

A network receiver is configured for receiving a base band carrier signal from another network transceiver via a network medium. A variable gain amplifier generates an amplified base band signal. An A/D converter generates a sequence of sample values representing the base band signal in response to the amplified base band signal. A gain control circuit monitors the sequence of sample values for a plurality of monitoring intervals in a sample time period, determines a range for each monitoring interval, and determines a gain setting for the variable gain amplifier.

US Patent:

6535073, Mar 18, 2003

Filed:

Aug 8, 2000

Appl. No.:

09/633963

Inventors:

Atul Garg - San Jose CA
Colin D. Nayler - Sunnyvale CA

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H04L 2720

US Classification:

332103, 375295, 375298

Abstract:

A device for modulating a carrier signal comprises a mapper generating a baud rate data signal at a first data value frequency. A complex mixer and an upsampling device are used to increase the data value frequency and spectrum shift the data signal. A finite impulse response filter operating on the data signal to generate filtered first signal with characteristics that provide for reduced side band noise when the filtered signal is mixed to generate a quadrature amplitude modulated carrier.

US Patent:

6668032, Dec 23, 2003

Filed:

Apr 20, 2000

Appl. No.:

09/553110

Inventors:

Colin D. Nayler - Sunnyvale CA

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H04L 700

US Classification:

375355, 375340, 375324, 329304, 329317, 329348

Abstract:

A network receiver is configured for receiving a modulated carrier signal representing a data frame from another network transceiver via a network medium, the modulated carrier signal may be either a pulse position modulated (PPM) carrier, a quadrature amplitude modulated (QAM) carrier, or a compatibility mode frame including both PPM and QAM portions. The network receiver is configured to select an A/D sampling clock frequency corresponding to the detected frame type.

US Patent:

6771750, Aug 3, 2004

Filed:

Oct 29, 1998

Appl. No.:

09/181559

Inventors:

Colin Nayler - Sunnyvale CA
Phil Keller - Fremont CA
Oikwan Tsang - San Jose CA
Hung Vo - San Jose CA
Dennis Lau - Fremont CA
Yi Cheng - San Jose CA
Zhen-Hua Liu - Sunnyvale CA

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H04L 2503

US Classification:

379 9301, 375318

Abstract:

A physical layer transceiver of a home network station connected to a telephone medium has an architecture enabling adaptation of detection circuitry based on received network signals to enable reliable recovery of data signals. The physical layer transceiver includes an input amplifier that amplifies network signals according to one of 128 gain settings set by a receiver gain control signal. A signal conditioning circuit includes an envelope detector configured for outputting an envelope of the amplified received signal, and an energy detector configured for outputting an energy signal of the amplified received signals. The envelope signal and the energy signal are supplied to slicer threshold circuits, configured for outputting noise, peak, data event and energy event signals based on noise threshold, peak threshold, data transition threshold, and energy threshold signals, respectively. A digital controller controls the input amplifier gain and the threshold values, and adjusts the gain and threshold values based on the noise event signal and the peak event signal within an access ID (AID) interval. Hence, the receiver can be optimized on a per-packet basis for receiving network signals by adjusting the receiver portion during the AID preamble phase of the data packet.

US Patent:

6782058, Aug 24, 2004

Filed:

Jan 24, 2001

Appl. No.:

09/769203

Inventors:

Colin D. Nayler - Sunnyvale CA

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H04L 2714

US Classification:

375324, 375316, 375325, 329346, 329304

Abstract:

A circuit for demodulating a modulated carrier includes a sampler receiving the modulated carrier signal and generating a digital carrier signal represented by a sequence of sample values in accordance with a clock signal at a first sampling frequency. A complex mixer frequency shifts the digital carrier signal by a frequency equal to one fourth the sampling frequency to generate a frequency shifted data signal with a sampling rate at the first sampling frequency. A decimation circuit generates four decimated signals from the frequency shifted signal, each at a decimated sampling rate. A resampling circuit generates a data signal at the decimated sampling rate and at a phase independent of the clock signal.

US Patent:

6819760, Nov 16, 2004

Filed:

Jun 21, 1999

Appl. No.:

09/336711

Inventors:

Colin Nayler - Sunnyvale CA

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H04M 100

US Classification:

37939001, 379394, 37939501, 379398

Abstract:

A novel physical layer transceiver is provided for receiving data transmitted via residential wiring. The transceiver includes an input circuit for receiving an incoming pulse signal, and an energy detector responsive to the incoming pulse signal for producing a pulse energy value representing energy of the incoming pulse signal. An adaptive energy detector gain control circuit is responsive to the pulse energy value for adaptively controlling gain of the energy detector so as to maintain the pulse energy value at a predetermined level. The gain of the energy detector is controlled in response to at least one of access identification pulses preceding data pulses to identify the transmitting station. The adaptive energy detector gain control circuit includes a comparator for comparing a pulse energy value produced by the energy detector with a preset threshold level, and a controller for supplying the energy detector with a gain control value. The controller reduces the gain of the energy detector if the pulse energy value exceeds the threshold level, and raises the gain of the energy detector if the pulse energy value is less than the threshold level.

US Patent:

6862315, Mar 1, 2005

Filed:

Jul 25, 2000

Appl. No.:

09/624785

Inventors:

Atul Garg - San Jose CA, US
Colin D. Nayler - Sunnyvale CA, US

Assignee:

Advanced Micro Devices, Inc. - Sunnyvale CA

International Classification:

H03H007/30

US Classification:

375232, 375350

Abstract:

A network receiver is configured for receiving a modulated carrier signal representing a data frame from a network transmitter via a network medium, the receiver includes an adaptive equalizer with a finite impulse response filter for filtering the received signal. The filter utilizes a plurality filter coefficients. A cache stores a plurality of sets of coefficients for use by the filter and the equalizer selects a set of coefficients for receiving the data frame.