公开(公告)号：EP0883840A1

公开(公告)日：1998-12-16

申请号：EP96937033.0

申请日：1996-10-29

Applicant: ADVANCED MICRO DEVICES INC.

Inventor： RUNALDUE, Thomas, A. ,  CHENG, Yi

IPC: H04L25 ,  G06F1

CPC classification number: H04L25/03834 ,  G06F1/022

Abstract: A system for synthesizing a waveform that employs combinatorial logic to generate digital data for each of a set of preselected waveforms. The system includes circuitry for selecting a sequence of the preselected waveform pulses in response to a data signal and circuitry for converting the digital data for the sequence of the preselected waveform pulses into the waveform.

公开(公告)号：EP0864208A1

公开(公告)日：1998-09-16

申请号：EP97924498.0

申请日：1997-04-11

Applicant: ADVANCED MICRO DEVICES INC.

Inventor： CHENG, Yi

IPC: H03H11 ,  H04B3

CPC classification number: H03H11/0422 ,  H04B3/144

Abstract: A CMOS transmission line equalizer is provided for receiving distorted signals transmitted through a transmission line and for compensating for the signal distortion. The equalizer has a transfer function characteristic with a single pole and a single zero. The transfer function includes a mirroring ratio circuit (CMR) for controlling the ratio between the single pole and the single zero. The mirroring ratio circuit is controlled by transistor size ratio. The single zero serves to cancel the dominant pole in the transfer function of the transmission line so as to compensate for the signal distortion caused by the transmission line.

Abstract translation: CMOS传输线均衡器被提供用于接收通过传输线传输的失真信号并且用于补偿信号失真。 均衡器具有单极点和零点的传递函数特性。 传递函数包括用于控制单极点与单个零点之间的比例的镜像比率电路（CMR）。 镜像比例电路由晶体管尺寸比例控制。 单个零点用于消除传输线传递函数中的主导极点，以补偿传输线引起的信号失真。

公开(公告)号：EP0880826B1

公开(公告)日：2001-05-16

申请号：EP96936984.2

申请日：1996-10-25

Applicant: ADVANCED MICRO DEVICES INC.

Inventor： CHENG, Yi ,  RUNALDUE, Thomas, J.

IPC: H03M1/66

CPC classification number: H03M1/662 ,  H03M1/745 ,  H03M1/747

Abstract: A digital to analog converter that includes circuitry that converts sequences of positive and negative digital data samples into electrical currents and current mirror circuitry that generates an analog waveform by combining and amplifying the electrical currents.

公开(公告)号：EP0988711B1

公开(公告)日：2002-04-10

申请号：EP97952587.0

申请日：1997-12-18

Applicant: ADVANCED MICRO DEVICES INC.

Inventor： CHENG, Yi ,  LIU, Zhenhua ,  RUNALDUE, Thomas, Jefferson

IPC: H04B3/14 ,  H04L25/02 ,  G01B7/02

CPC classification number: G01B7/02 ,  H03M1/367

公开(公告)号：EP0988711A1

公开(公告)日：2000-03-29

申请号：EP97952587.0

申请日：1997-12-18

Applicant: ADVANCED MICRO DEVICES INC.

Inventor： CHENG, Yi ,  LIU, Zhenhua ,  RUNALDUE, Thomas, Jefferson

IPC: H04B3/14 ,  H04L25/02 ,  G01B7/02

CPC classification number: G01B7/02 ,  H03M1/367

Abstract: A cable length estimation circuit (110) for receiving an input MLT-3 signal provided through an arbitrary length cable (104) and providing a control signal to an equalizer (108) indicating the estimated length of the cable enabling the equalizer (108) to compensate for distortion of the MLT-3 signal resulting from the cable. The cable length estimation circuit (110) includes an edge rate detection circuit (400) for measuring the rate of change in voltage with respect to time during transitions of the MLT-3 signal to provide an indication of cable length. The cable length estimation circuit (110) can also include a digital averaging circuit (402) which provides an average value for signals from the edge rate detection circuit for a desired number of transitions of the MLT-3 signal. The cable length estimation (110) can also include a baseline wander detection circuit (404) which functions so that previous cable length estimations are provided when baseline wander is detected.

公开(公告)号：EP0883841A1

公开(公告)日：1998-12-16

申请号：EP96937054.0

申请日：1996-10-29

Applicant: ADVANCED MICRO DEVICES INC.

Inventor： RUNALDUE, Thomas, J. ,  CHENG, Yi

IPC: H04L25 ,  G06F1

CPC classification number: H04L25/03834 ,  G06F1/02 ,  G06F1/022 ,  G06F1/0321

Abstract: A system for synthesizing a waveform includes waveform synthesis circuitry that generates digital data for each of a set of waveform pulses having preselected slopes at zero-crossing. A sequencer tracks the history of information contained in a data signal and selects a sequence of the waveform pulses in response to the history such that the sequence conveys the history of information while minimizing mismatches between the slopes of adjacent waveform pulses in the sequence.

公开(公告)号：EP0880826A1

公开(公告)日：1998-12-02

申请号：EP96936984.0

申请日：1996-10-25

Applicant: ADVANCED MICRO DEVICES INC.

Inventor： CHENG, Yi ,  RUNALDUE, Thomas, J.

IPC: H03M1

CPC classification number: H03M1/662 ,  H03M1/745 ,  H03M1/747

Abstract: A digital to analog converter that includes circuitry that converts sequences of positive and negative digital data samples into electrical currents and current mirror circuitry that generates an analog waveform by combining and amplifying the electrical currents.