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    • 31. 发明申请
    • System and Method for Termination Powered Differential Interface Periphery
    • 终端电源差分接口周边系统和方法
    • US20120182480A1
    • 2012-07-19
    • US13434270
    • 2012-03-29
    • Hongwu Chi
    • Hongwu Chi
    • H04N5/38
    • H04L25/0264H03K19/0008H04L25/0272H04L25/028
    • An apparatus and method for supplying power to the peripheral circuits of a transmitter circuit, especially an HDMI transmitter circuit, is disclosed. In an HDMI transmitter, the termination resistors of the output driver are part of the receiver. DC power for the driver is supplied through these termination resistors. In prior art implementations, power supplied by the receiver circuit is wasted in the DC set-up circuit of the differential line driver. In various embodiments, this wasted power may be recovered from the remote termination to power selected peripheral circuits of the transmitter. The use of this wasted power may reduce the total system power consumption.
    • 公开了一种用于向发射机电路的外围电路,特别是HDMI发射机电路供电的装置和方法。 在HDMI发送器中,输出驱动器的终端电阻是接收器的一部分。 通过这些终端电阻提供驱动器的直流电源。 在现有技术的实施中,由差分线路驱动器的直流建立电路中浪费了由接收器电路提供的功率。 在各种实施例中,可以从远程终端恢复该浪费的功率以对发射机的所选择的外围电路供电。 使用这种浪费的电源可能会降低系统总功耗。
    • 33. 发明申请
    • Trace Canceller with Equalizer Adjusted for Trace Length Driving Variable-Gain Amplifier with Automatic Gain Control Loop
    • 具有均衡器的跟踪消除器调整为带有自动增益控制回路的跟踪长度驱动可变增益放大器
    • US20120087405A1
    • 2012-04-12
    • US12902296
    • 2010-10-12
    • Hung-Yan CheungMichael Y. Zhang
    • Hung-Yan CheungMichael Y. Zhang
    • H04L25/03H03H7/30
    • H04B3/466H04B3/146H04L25/0264H04L25/03878H04L25/03885
    • 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.
    • 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。
    • 36. 发明授权
    • Receiving circuit and receiving system
    • 接收电路和接收系统
    • US08063696B2
    • 2011-11-22
    • US12597885
    • 2009-02-02
    • Akinori Shinmyo
    • Akinori Shinmyo
    • G06G7/12
    • H04L25/0264H03K17/005H04L25/0272
    • An output circuit (12) converts a pair of current signals supplied to a pair of common nodes (NCa and NCb) into a pair of voltage signals (VOa and VOb). In each of input buffer circuits (11, 11, . . . ), a constant current generation section (101) generates, in an output mode, a pair of constant currents in a pair of current paths going from a pair of intermediate nodes (NMa and NMb) to a reference node (VDD1), and stops the generation of the pair of constant currents in a cutoff mode. A voltage-to-current conversion section (102) generates, in the output mode, a pair of input currents corresponding to a pair of input signals (Sa and Sb) in a pair of current paths going from the pair of intermediate nodes (NMa and NMb) to a reference node (GND) to thereby generate a pair of current signals (Ia and Ib) in a pair of current paths going from the pair of intermediate nodes (NMa and NMb) to the pair of common nodes (NCa and NCb), and stops the generation of the pair of input currents in the cutoff mode.
    • 输出电路(12)将提供给一对公共节点(NCa和NCb)的一对电流信号转换为一对电压信号(VOa和VOb)。 在每个输入缓冲电路(11,11等)中,恒流产生部分(101)在输出模式中产生一对电流路径中的一对恒定电流(从一对中间节点) NMa和NMb)连接到参考节点(VDD1),并且在截止模式中停止产生一对恒定电流。 电压 - 电流转换部分(102)在输出模式下产生与从一对中间节点(NMa)中的一对电流路径中的一对输入信号(Sa和Sb)相对应的一对输入电流 和NMb)连接到参考节点(GND),从而在从一对中间节点(NMa和NMb)到一对公共节点(NCa和Nb)的一对电流路径中产生一对电流信号(Ia和Ib) NCb),并且在截止模式下停止生成一对输入电流。