公开(公告)号：WO2003032652A3

公开(公告)日：2003-04-17

申请号：PCT/US2002/032602

申请日：2002-10-11

Applicant: RAMBUS INC. ,  ZERBE, Jared ,  CHAU, Pak, Shing ,  STONECYPHER, William, Franklin

Inventor： ZERBE, Jared ,  CHAU, Pak, Shing ,  STONECYPHER, William, Franklin

IPC: G01R31/28

Abstract: A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit (101) circuit of the system and is transmitted to a receive (103) circuit. A similar pattern of information is generated in the receive (103) circuit and used as a reference. The receive (103) circuit compares the patterns. Any differences (114) between the patterns are observable. In one embodiment, a linear feedback shift (105, 108) register (LFSR) implemented to produce patterns. An embodiment of the invention may be practiced with various types of signaling systems, including those with single-ended signals and those with differential signals. An embodiment of the invention may be applied to systems communicating a single bit of information on a single conductor at a given time and to systems communicating multiple bits of information on a single conductor simultaneously.

公开(公告)号：WO2003032652A2

公开(公告)日：2003-04-17

申请号：PCT/US2002/032602

申请日：2002-10-11

Applicant: RAMBUS INC. ,  ZERBE, Jared ,  CHAU, Pak, Shing ,  STONECYPHER, William, Franklin

Inventor： ZERBE, Jared ,  CHAU, Pak, Shing ,  STONECYPHER, William, Franklin

IPC: H04Q

CPC classification number: G01R31/31717 ,  G01R31/31703 ,  G01R31/3183 ,  G06F11/221 ,  H04B3/32

Abstract: A method and apparatus for evaluating and optimizing a signaling system is described. Evaluation is accomplished using the same circuits actually involved in normal operation of the signaling system. Capability for in-situ testing of a signaling system is provided, and information may be obtained from the actual perspective of a receive circuit in the system. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive circuit and used as a reference. The receive circuit compares the patterns. Any differences between the patterns are observable. Preferably, the patterns are repeating patterns that allow many iterations of testing to be performed. In one embodiment, a linear feedback shift register (LFSR) is implemented to produce patterns. Information obtained from testing may be used to assess the effects of various system parameters, including but not limited to output current, crosstalk cancellation coefficients, and self-equalization coefficients, and system parameters may be adjusted to optimize system performance. An embodiment of the invention may be practiced with various types of signaling systems, including those with single-ended signals and those with differential signals. An embodiment of the invention may be applied to systems communicating a single bit of information on a single conductor at a given time and to systems communicating multiple bits of information on a single conductor simultaneously.

Abstract translation: 描述了用于评估和优化信令系统的方法和装置。 使用与信号系统的正常操作实际相关的相同电路进行评估。 提供了对信号系统的原位测试的能力，并且可以从系统中的接收电路的实际角度获得信息。 在系统的发送电路中产生测试信息的模式，并将其发送到接收电路。 在接收电路中产生类似的信息模式并用作参考。 接收电路比较图案。 模式之间的任何差异是可观察的。 优选地，图案是允许执行许多测试迭代的重复图案。 在一个实施例中，实现线性反馈移位寄存器（LFSR）以产生模式。 从测试获得的信息可以用于评估各种系统参数的影响，包括但不限于输出电流，串扰消除系数和自平衡系数，并且可以调整系统参数以优化系统性能。 本发明的一个实施例可以用各种类型的信令系统来实现，包括具有单端信号和具有差分信号的信号系统。 本发明的实施例可以应用于在给定时间在单个导体上传送单个信息位的系统和同时在单个导体上传送多个信息位的系统。