Yi Chu Cheng

6771750, Aug 3, 2004

Oct 29, 1998

09/181559

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

Advanced Micro Devices, Inc. - Sunnyvale CA

H04L 2503

379 9301, 375318

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.

7161911, Jan 9, 2007

Mar 15, 2002

10/099050

Calvin Fang - Milpitas CA, US
Yi Cheng - San Jose CA, US
William Lo - Cupertino CA, US

Marvell International, Ltd - Hamilton

H04B 1/44
H04L 12/56

370282, 370419

A first network device is provided in communications with a second network device comprising a physical layer device. The physical layer device comprises a transmitter to transmit an autonegotiation signal to the second network device, a receiver to receive a received signal from the second network device, and a controller comprising an autonegotiation controller to set a highest common data rate between the first network device and the second network device. The autonegotiation controller compares the autonegotiation signal and the received signal and selectively prevents the autonegotiation when the autonegotiation signal is the same as the received signal.

7724692, May 25, 2010

Jan 5, 2007

11/650052

Calvin Fang - Milpitas CA, US
Yi Cheng - San Jose CA, US
William Lo - Cupertino CA, US

Marvell International Ltd. - Hamilton

H04B 1/44

370282, 370419, 709237

A physical layer device comprises a transmitter of a first network device that transmits an autonegotiation signal to a second network device. A receiver of the first network device receives a received signal from the second network device. An autonegotiation controller autonegotiates link parameters for a link between the first network device and the second network device, monitors autonegotiation pulses in the autonegotiation signal relative to autonegotiation pulses in the received signal received during a window, and selectively blinds autonegotiation based on the monitoring.

60878606, Jul 11, 2000

Oct 14, 1998

9/172089

Zhenhua Liu - Sunnyvale CA
Yi Cheng - San Jose CA

Advanced Micro Devices, Inc. - Sunnyvale CA

H03K 5153

327 65

A CMOS device for generating a waveformn envelope is provided in a network that uses a twisted pair medium, such as a telephone line, to connect stations. The CMOS device receives analog signals representing pulsed data signals sent over the telephone line and generates an envelope waveform for the received analog signal. The envelope waveform can then be used to detect the arrival of data, as opposed to noise on the network.

20180183694, Jun 28, 2018

Jul 1, 2015

15/738099

- Houston TX, US
Yi Cheng - Palo Alto CA, US
Ruben Rodriguez Alvarez - Palo Alto CA, US

H04L 12/26

In some described examples, a latency measurer receives packets from a tapping point. The packets may comprise wrapped packets including a wrapper header. The wrapper header may include a capture timestamp, a tapping point identifier, packet address and port information, and a message content hash.