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    • 2. 发明申请
    • PHASE DETECTION CIRCUITS AND METHODS
    • 相位检测电路和方法
    • WO2011090767A3
    • 2011-10-06
    • PCT/US2010062615
    • 2010-12-30
    • RAMBUS INCARYANFAR FARSHIDLEE HAE-CHANGWERNER CARL
    • ARYANFAR FARSHIDLEE HAE-CHANGWERNER CARL
    • H03L7/085
    • H03L7/085G01R25/00H03D13/00H03L7/0816
    • A phase detector circuit compares the phases of first and second periodic input signals to generate an output signal. The phase detector includes a circuit that makes two different combinations of the first and the second periodic input signals to generate third and fourth periodic signals. This circuit causes the third periodic signal to be based on a first combination of the first periodic signal and the second periodic signal that imparts a first relative phase shift. The circuit causes the fourth periodic signal to be based on a second combination of the first periodic signal and the second periodic signal to provide a different relative phase shift. The phase detector also includes a comparison circuit that compares a measure of the power of the third periodic signal to a measure of the power of the fourth periodic signal to generate the phase comparison output signal.
    • 相位检测器电路比较第一和第二周期性输入信号的相位以产生输出信号。 相位检测器包括使第一和第二周期性输入信号的两种不同组合产生第三和第四周期性信号的电路。 该电路使得第三周期性信号基于赋予第一相对相移的第一周期性信号和第二周期性信号的第一组合。 该电路使得第四周期性信号基于第一周期性信号和第二周期性信号的第二组合以提供不同的相对相移。 相位检测器还包括比较电路,该比较电路将第三周期性信号的功率测量结果与第四周期性信号功率测量结果进行比较以生成相位比较输出信号。
    • 3. 发明申请
    • METHOD AND APPARATUS FOR CALIBRATING A MULTI-LEVEL CURRENT MODE DRIVER AND FOR GENERATING A MULTI-LEVEL REFERENCE VOLTAGE IN SYSTEMS USING EQUALIZATION OR CROSSTALK CANCELLATION
    • 用于校准多级电流模式驱动器的方法和装置,以及使用均衡或CROSSTALK取消在系统中产生多级参考电压
    • WO0221782A2
    • 2002-03-14
    • PCT/US0127478
    • 2001-09-05
    • RAMBUS INCWERNER CARLHOROWITZ MARKCHAU PARKBEST SCOTTLIAW H JSIDIROPOULOS STEFANOSZERBE JARED LEVANKIM JUN
    • WERNER CARLHOROWITZ MARKCHAU PARKBEST SCOTTLIAW H JSIDIROPOULOS STEFANOSZERBE JARED LEVANKIM JUN
    • H04L25/02H04L25/03H04L25/08H04L25/49
    • H04L25/0282H04L25/0272H04L25/0298H04L25/03878H04L25/08H04L25/4902
    • The current controller includes a multi-level voltage reference and receives at least onesource calibration signal. A comparator is coupled by a coupling network t the multi-level voltage reference and the source calibration signal. A selected voltage is applied from the multi-level voltage reference and a selected source calibration signal is applied to the comparator. Further, system and method are shown for generation of at least one reference voltage level in a bus system. A reference voltage generator on a current driver includes at least one reference voltage level, at least one control signal, and an active device. The active device is coupled to the at least one control signal, such as a current signal, and a selected reference voltage of the at least one reference voltage level. The active device is arranged to shift the at least one reference voltage level based on the at least one current control signal such as an equalization signal, a crosstalk signal, or the combination thereof, employed on the current driver. Further, low-latency equalization mechanisms for multi-PAM communication systems are disclosed that reduce delay and complexity in signal correction mechanisms. The equalization mechanisms tap into input signals for a multi-PAM signal driver, and compensate for attenuation along a signal transmission line, crosstalk between adjacent lines, and signal reflections due to impedance discontinuities along the line.
    • 电流控制器包括多电平电压基准并且接收至少一个源校准信号。 比较器通过耦合网络耦合多电平电压基准和源校准信号。 从多电平参考电压施加所选择的电压,并且将选择的源校准信号施加到比较器。 此外,示出了在总线系统中产生至少一个参考电压电平的系统和方法。 电流驱动器上的参考电压发生器包括至少一个参考电压电平,至少一个控制信号和有源器件。 有源器件耦合到至少一个控制信号,例如电流信号,以及所选择的至少一个参考电压电平的参考电压。 有源器件被布置为基于在当前驱动器上采用的至少一个电流控制信号(例如均衡信号,串扰信号或其组合)来移位至少一个参考电压电平。 此外,公开了用于多PAM通信系统的低延迟均衡机制,其减少信号校正机制中的延迟和复杂性。 均衡机制分为用于多PAM信号驱动器的输入信号,并且补偿沿着信号传输线的衰减,相邻线之间的串扰以及由于沿线的阻抗不连续性引起的信号反射。
    • 4. 发明申请
    • CALIBRATION OF A MULTI-LEVEL CURRENT MODE DRIVER
    • 多级电流模式驱动器的校准
    • WO0221782A9
    • 2003-03-20
    • PCT/US0127478
    • 2001-09-05
    • RAMBUS INCWERNER CARLHOROWITZ MARKCHAU PARKBEST SCOTTLIAW H JSIDIROPOULOS STEFANOSZERBE JARED LEVANKIM JUN
    • WERNER CARLHOROWITZ MARKCHAU PARKBEST SCOTTLIAW H JSIDIROPOULOS STEFANOSZERBE JARED LEVANKIM JUN
    • H04L25/02H04L25/03H04L25/08H04L25/49
    • H04L25/0282H04L25/0272H04L25/0298H04L25/03878H04L25/08H04L25/4902
    • The current controller includes a multi-level voltage reference and receives at least onesource calibration signal. A comparator is coupled by a coupling network t the multi-level voltage reference and the source calibration signal. A selected voltage is applied from the multi-level voltage reference and a selected source calibration signal is applied to the comparator. Further, system and method are shown for generation of at least one reference voltage level in a bus system. A reference voltage generator on a current driver includes at least one reference voltage level, at least one control signal, and an active device. The active device is coupled to the at least one control signal, such as a current signal, and a selected reference voltage of the at least one reference voltage level. The active device is arranged to shift the at least one reference voltage level based on the at least one current control signal such as an equalization signal, a crosstalk signal, or the combination thereof, employed on the current driver. Further, low-latency equalization mechanisms for multi-PAM communication systems are disclosed that reduce delay and complexity in signal correction mechanisms. The equalization mechanisms tap into input signals for a multi-PAM signal driver, and compensate for attenuation along a signal transmission line, crosstalk between adjacent lines, and signal reflections due to impedance discontinuities along the line.
    • 电流控制器包括多电平电压基准并且接收至少一个源校准信号。 比较器通过耦合网络耦合多电平电压基准和源校准信号。 从多电平参考电压施加所选择的电压,并且将选择的源校准信号施加到比较器。 此外,示出了在总线系统中产生至少一个参考电压电平的系统和方法。 电流驱动器上的参考电压发生器包括至少一个参考电压电平,至少一个控制信号和有源器件。 有源器件耦合到至少一个控制信号,例如电流信号,以及所选择的至少一个参考电压电平的参考电压。 有源器件被布置成基于在当前驱动器上采用的至少一个电流控制信号(例如均衡信号,串扰信号或其组合)来移位至少一个参考电压电平。 此外,公开了用于多PAM通信系统的低延迟均衡机制,其减少信号校正机制中的延迟和复杂性。 均衡机制分为用于多PAM信号驱动器的输入信号,并且补偿沿着信号传输线的衰减,相邻线之间的串扰以及由于沿线的阻抗不连续性引起的信号反射。