公开(公告)号：US09106464B2

公开(公告)日：2015-08-11

申请号：US14166563

申请日：2014-01-28

申请人： Pericom Semiconductor Corporation

发明人： Hung-Yan Cheung ,  Michael Y. Zhang

IPC分类号： H03K11/00 ,  H04L25/60 ,  H04L25/64 ,  H04L25/03 ,  H04B3/14 ,  H04B3/466 ,  H04L25/02

CPC分类号： H04B3/466 ,  H04B3/146 ,  H04L25/0264 ,  H04L25/03878 ,  H04L25/03885

摘要： Distortions of both amplitude and phase along a transmission line are compensated for by a trace canceller inserted between a transmitter and a receiver. The trace canceller has an equalizer that compensates for a trace length between the transmitter and the trace canceller. A variable gain amplifier between the equalizer and an output buffer has its gain controlled by an automatic gain control circuit that compares low-frequency swings of the input and output of the trace canceller. The gain of the variable gain amplifier is reduced to prevent the output buffer from saturating and clipping peak voltages on its output. Thus both the variable gain amplifier and the output buffer remain in the linear region. Training pulses from the transmitter are passed through the trace canceller without clipping of peak voltages, allowing the transmitter and receiver to adjust transmission parameters to best match the transmission line.

摘要翻译： 沿着传输线的幅度和相位的变形由插入在发射机和接收机之间的跟踪消除器补偿。 跟踪消除器具有补偿发送器和跟踪消除器之间的跟踪长度的均衡器。 均衡器和输出缓冲器之间的可变增益放大器的增益由自动增益控制电路控制，自动增益控制电路比较跟踪消除器的输入和输出的低频摆幅。 降低可变增益放大器的增益，以防止输出缓冲器饱和和削减其输出端的峰值电压。 因此，可变增益放大器和输出缓冲器都保持在线性区域中。 来自发射机的训练脉冲通过跟踪消除器而不削减峰值电压，允许发射机和接收机调整传输参数以最好地匹配传输线路。

公开(公告)号：US09264102B2

公开(公告)日：2016-02-16

申请号：US14793582

申请日：2015-07-07

申请人： Pericom Semiconductor Corporation

发明人： Hung-Yan Cheung ,  Michael Y. Zhang

IPC分类号： H03K11/00 ,  H04L25/60 ,  H04L25/64 ,  H04B3/466 ,  H04B3/14 ,  H04L25/02 ,  H04L25/03

CPC分类号： H04B3/466 ,  H04B3/146 ,  H04L25/0264 ,  H04L25/03878 ,  H04L25/03885

摘要： Distortions of both amplitude and phase along a transmission line are compensated for by a trace canceller inserted between a transmitter and a receiver. The trace canceller has an equalizer that compensates for a trace length between the transmitter and the trace canceller. A variable gain amplifier between the equalizer and an output buffer has its gain controlled by an automatic gain control circuit that compares low-frequency swings of the input and output of the trace canceller. The gain of the variable gain amplifier is reduced to prevent the output buffer from saturating and clipping peak voltages on its output. Thus both the variable gain amplifier and the output buffer remain in the linear region. Training pulses from the transmitter are passed through the trace canceller without clipping of peak voltages, allowing the transmitter and receiver to adjust transmission parameters to best match the transmission line.

公开(公告)号：US09261550B2

公开(公告)日：2016-02-16

申请号：US14307340

申请日：2014-06-17

申请人： Pericom Semiconductor Corporation

发明人： Hung-Yan Cheung ,  Michael Y. Zhang

IPC分类号： G01R31/02 ,  G01R31/04

CPC分类号： G01R31/021 ,  G01R31/026 ,  G01R31/04

摘要： An in-situ unplug detector circuit detects when a cable is disconnected or unplugged. Detection does not have to wait for normal signaling to pause, such at the end of a frame or timeout. Instead, detection occurs during normal signaling. When the cable is disconnected, the transmitter no longer drives the load at the far end of the cable, and thus can drive the near end to a higher high voltage and to a lower low voltage. The increased voltage swing is detected by a detector at the near end that amplifies the transmitter output to the cable. A fast detector has a higher bandwidth and faster response time than a slow detector, and generates a fast detect signal that crosses over a slow detect signal. When the cable is disconnected, the fast detect signal again crosses over the slow detect signal, and decision logic activates an unplug signal.

摘要翻译： 原位拔插检测器电路检测电缆何时断开或拔下电源。 检测不必等待正常的信令暂停，例如帧或超时结束。 相反，检测发生在正常信令期间。 当电缆断开时，变送器不再驱动电缆远端的负载，从而可将近端驱动到较高的高电压和较低的低电压。 增加的电压摆幅由近端的检测器检测，放大到电缆的发射机输出。 快速检测器具有比慢速检测器更高的带宽和更快的响应时间，并且产生跨越慢速检测信号的快速检测信号。 当电缆断开时，快速检测信号再次超过慢速检测信号，决定逻辑激活拔插信号。

公开(公告)号：US20150311950A1

公开(公告)日：2015-10-29

申请号：US14793582

申请日：2015-07-07

申请人： Pericom Semiconductor Corporation

发明人： Hung-Yan Cheung ,  Michael Y. Zhang

IPC分类号： H04B3/466 ,  H04B3/14 ,  H04L25/03

CPC分类号： H04B3/466 ,  H04B3/146 ,  H04L25/0264 ,  H04L25/03878 ,  H04L25/03885

摘要： Distortions of both amplitude and phase along a transmission line are compensated for by a trace canceller inserted between a transmitter and a receiver. The trace canceller has an equalizer that compensates for a trace length between the transmitter and the trace canceller. A variable gain amplifier between the equalizer and an output buffer has its gain controlled by an automatic gain control circuit that compares low-frequency swings of the input and output of the trace canceller. The gain of the variable gain amplifier is reduced to prevent the output buffer from saturating and clipping peak voltages on its output. Thus both the variable gain amplifier and the output buffer remain in the linear region. Training pulses from the transmitter are passed through the trace canceller without clipping of peak voltages, allowing the transmitter and receiver to adjust transmission parameters to best match the transmission line.

摘要翻译： 沿着传输线的幅度和相位的变形由插入在发射机和接收机之间的跟踪消除器补偿。 跟踪消除器具有补偿发送器和跟踪消除器之间的跟踪长度的均衡器。 均衡器和输出缓冲器之间的可变增益放大器的增益由自动增益控制电路控制，自动增益控制电路比较跟踪消除器的输入和输出的低频摆幅。 降低可变增益放大器的增益，以防止输出缓冲器饱和和削减其输出端的峰值电压。 因此，可变增益放大器和输出缓冲器都保持在线性区域中。 来自发射机的训练脉冲通过跟踪消除器而不削减峰值电压，允许发射机和接收机调整传输参数以最好地匹配传输线路。

公开(公告)号：US20150002167A1

公开(公告)日：2015-01-01

申请号：US14307340

申请日：2014-06-17

申请人： Pericom Semiconductor Corporation

发明人： Hung-Yan Cheung ,  Michael Y. Zhang

IPC分类号： G01R31/02 ,  G01R31/04

CPC分类号： G01R31/021 ,  G01R31/026 ,  G01R31/04

摘要： An in-situ unplug detector circuit detects when a cable is disconnected or unplugged. Detection does not have to wait for normal signaling to pause, such at the end of a frame or timeout. Instead, detection occurs during normal signaling. When the cable is disconnected, the transmitter no longer drives the load at the far end of the cable, and thus can drive the near end to a higher high voltage and to a lower low voltage. The increased voltage swing is detected by a detector at the near end that amplifies the transmitter output to the cable. A fast detector has a higher bandwidth and faster response time than a slow detector, and generates a fast detect signal that crosses over a slow detect signal. When the cable is disconnected, the fast detect signal again crosses over the slow detect signal, and decision logic activates an unplug signal.

摘要翻译： 原位拔插检测器电路检测电缆何时断开或拔下电源。 检测不必等待正常的信令暂停，例如帧或超时结束。 相反，检测发生在正常信令期间。 当电缆断开时，变送器不再驱动电缆远端的负载，从而可将近端驱动到较高的高电压和较低的低电压。 增加的电压摆幅由近端的检测器检测，放大到电缆的发射机输出。 快速检测器具有比慢速检测器更高的带宽和更快的响应时间，并且产生跨越慢速检测信号的快速检测信号。 当电缆断开时，快速检测信号再次超过慢速检测信号，决定逻辑激活拔插信号。

公开(公告)号：US20140140386A1

公开(公告)日：2014-05-22

申请号：US14166563

申请日：2014-01-28

申请人： Pericom Semiconductor Corporation

发明人： Hung-Yan Cheung ,  Michael Y. Zhang

IPC分类号： H04L25/03

CPC分类号： H04B3/466 ,  H04B3/146 ,  H04L25/0264 ,  H04L25/03878 ,  H04L25/03885

摘要： Distortions of both amplitude and phase along a transmission line are compensated for by a trace canceller inserted between a transmitter and a receiver. The trace canceller has an equalizer that compensates for a trace length between the transmitter and the trace canceller. A variable gain amplifier between the equalizer and an output buffer has its gain controlled by an automatic gain control circuit that compares low-frequency swings of the input and output of the trace canceller. The gain of the variable gain amplifier is reduced to prevent the output buffer from saturating and clipping peak voltages on its output. Thus both the variable gain amplifier and the output buffer remain in the linear region. Training pulses from the transmitter are passed through the trace canceller without clipping of peak voltages, allowing the transmitter and receiver to adjust transmission parameters to best match the transmission line.

摘要翻译： 沿着传输线的幅度和相位的变形由插入在发射机和接收机之间的跟踪消除器补偿。 跟踪消除器具有补偿发送器和跟踪消除器之间的跟踪长度的均衡器。 均衡器和输出缓冲器之间的可变增益放大器的增益由自动增益控制电路控制，自动增益控制电路比较跟踪消除器的输入和输出的低频摆幅。 降低可变增益放大器的增益，以防止输出缓冲器饱和和削减其输出端的峰值电压。 因此，可变增益放大器和输出缓冲器都保持在线性区域中。 来自发射机的训练脉冲通过跟踪消除器而不削减峰值电压，允许发射机和接收机调整传输参数以最好地匹配传输线路。