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    • 1. 发明授权
    • Variable voltage CMOS off-chip driver and receiver circuits
    • 可变电压CMOS片外驱动和接收电路
    • US08604828B1
    • 2013-12-10
    • US08657849
    • 1996-05-31
    • Harry Randall BickfordPaul William CoteusRobert Heath DennardDaniel Mark DrepsGerard Vincent Kopcsay
    • Harry Randall BickfordPaul William CoteusRobert Heath DennardDaniel Mark DrepsGerard Vincent Kopcsay
    • H03K19/0175
    • H03K19/0005H03K19/018521H03K19/018585
    • A structure is described having a plurality of electronic devices with the same or different internal CMOS voltages; an interconnection between two or more of the electronic devices; driver and receiver circuits which provide selectable input/output voltage levels for interfacing with several generations of CMOS technology, thus allowing chips fabricated in such technologies to communicate using a signal voltage range most suitable for each chip; Circuitry for selecting or adjusting the type of receiver circuit used, thus allowing either the use of a differential comparator circuit with an externally supplied reference voltage, or alternatively, the use of an inverter style receiver with an adjustable threshold, the selection being accomplished by setting the external reference to a predetermined voltage; Circuitry for selecting or adjusting the switching threshold of the inverter receiver circuit, which enables the threshold to be set appropriately for a given input signal voltage range.
    • 描述了具有多个具有相同或不同的内部CMOS电压的电子器件的结构; 两个或多个电子设备之间的互连; 驱动器和接收器电路,其提供用于与几代CMOS技术接口的可选输入/输出电压电平,从而允许以这种技术制造的芯片使用最适合于每个芯片的信号电压范围进行通信; 用于选择或调整所使用的接收器电路的类型的电路,从而允许使用具有外部提供的参考电压的差分比较器电路,或者使用具有可调阈值的逆变器式接收器,该选择通过设置 外部参考预定电压; 用于选择或调整逆变器接收器电路的开关阈值的电路,其使得能够针对给定输入信号电压范围适当地设定阈值。
    • 4. 发明授权
    • Smart memory interface
    • 智能内存界面
    • US06292903B1
    • 2001-09-18
    • US09106639
    • 1998-06-29
    • Paul William CoteusDaniel Mark DrepsFrank Ferraiolo
    • Paul William CoteusDaniel Mark DrepsFrank Ferraiolo
    • G06F104
    • G06F13/1689
    • A method and apparatus are disclosed for initiating a start-up operation of a system (1′) having a master device (1) and a slave device (14a-14n). The method comprises steps of: A) exercising the slave device (14a-14n) using the master device (1) to determine a temporal range within which temporal relationships of electrical signals need to be set in order to operate the system (1′) without error; B) setting the temporal relationships of the electrical signals so as to be within the determined temporal range; and C) storing a record of the determined temporal range, for subsequent use in operating the system (1′). In one embodiment of the invention, the system (1′) includes a memory control system of a computer system (1″), and the slave device (14a-14n) includes memory devices of the computer system (1″). The method of the invention substantially compensates for any differences in times of arrival for data being transferred from the master device (1) to the slave device (14a-14n), and vice versa, and thus minimizes the possibility of read/write errors being encountered, while increasing the overall processing speed and efficiency of the system (1′).
    • 公开了一种用于启动具有主设备(1)和从设备(14a-14n)的系统(1')的启动操作的方法和装置。 该方法包括以下步骤:A)使用主设备(1)来执行从设备(14a-14n)以确定需要设置电信号的时间关系以便操作系统(1')的时间范围, 没有错误; B)将电信号的时间关系设置在所确定的时间范围内; 和C)存储所确定的时间范围的记录,以供随后在操作系统(1')中使用。 在本发明的一个实施例中,系统(1')包括计算机系统(1“)的存储器控​​制系统,并且从设备(14a-14n)包括计算机系统(1”)的存储设备。 本发明的方法基本上补偿从主设备(1)传送到从设备(14a-14n)的数据的到达时间的任何差异,反之亦然,从而使读/写错误的可能性最小化 同时提高系统的整体处理速度和效率(1')。
    • 5. 发明授权
    • Dynamic line termination clamping circuit
    • 动态线路终端钳位电路
    • US6127840A
    • 2000-10-03
    • US42912
    • 1998-03-17
    • Paul William CoteusDaniel Mark DrepsFrank David Ferraiolo
    • Paul William CoteusDaniel Mark DrepsFrank David Ferraiolo
    • H03K5/007H03K19/0175H04L25/02H03K17/16H03K19/003
    • H04L25/0278H04L25/028H04L25/0292
    • A first circuit and a second circuit are connected by a pumped signal line that conducts a signal having a plurality of states. A dynamic termination circuit is connected to the pumped signal line. The dynamic termination circuit includes a switch responsive to the signal conducted by the pumped signal line such that the dynamic termination circuit is enabled only in response to certain of the plurality of states of the signal. In one embodiment, the switch is a first transistor that is coupled in series with a first impedance between a first reference voltage and an intermediate node. In this embodiment, the dynamic termination circuit further includes a second transistor coupled in series with a second impedance between a second reference voltage and the intermediate node and only first and second inverters that are each coupled between the intermediate node and the control input of a respective one of the first transistor and the second transistor.
    • 第一电路和第二电路通过导通具有多个状态的信号的泵浦信号线连接。 动态终端电路连接到泵浦信号线。 动态终端电路包括响应于由泵浦信号线传导的信号的开关,使得动态终端电路仅在响应于信号的多个状态中的某些状态时被使能。 在一个实施例中,开关是与第一参考电压和中间节点之间的第一阻抗串联耦合的第一晶体管。 在该实施例中,动态终端电路还包括与第二参考电压和中间节点之间的第二阻抗串联耦合的第二晶体管,并且仅包括第一和第二反相器,每个反相器耦合在相应的中间节点和控制输入端 第一晶体管和第二晶体管之一。
    • 6. 发明申请
    • Method for Performing Memory Diagnostics Using a Programmable Diagnostic Memory Module
    • 使用可编程诊断内存模块执行内存诊断的方法
    • US20090049341A1
    • 2009-02-19
    • US11840498
    • 2007-08-17
    • Moises CasesDaniel Mark DrepsBhyrav M. MutnuryNam H. PhamDaniel N. De Araujo
    • Moises CasesDaniel Mark DrepsBhyrav M. MutnuryNam H. PhamDaniel N. De Araujo
    • G06F11/26G06F9/455
    • G06F11/24
    • A method for performing memory diagnostics using a programmable diagnostic memory module provides enhanced testability of memory controller and memory subsystem design. The programmable diagnostic memory module includes an interface for communicating with an external diagnostic system, and the interface is used to transfer commands to the memory module to alter various behaviors of the memory module. The altered behaviors may be changing data streams that are written to the memory module to simulate errors, altering the timing and/or loading of the memory module signals, downloading programs for execution by a processor core within the memory module, changing driver strengths of output signals of the memory module, and manipulating in an analog domain, signals at terminals of the memory module such as injecting noise on power supply connections to the memory module. The memory module may emulate multiple selectable memory module types, and may include a complete storage array to provide standard memory module operation.
    • 使用可编程诊断存储器模块执行存储器诊断的方法提供了存储器控制器和存储器子系统设计的增强的可测试性。 可编程诊断存储器模块包括用于与外部诊断系统通信的接口,并且该接口用于将命令传送到存储器模块以改变存储器模块的各种行为。 改变的行为可能是改变被写入存储器模块的数据流,以模拟错误,改变存储器模块信号的定时和/或加载,下载由存储器模块内的处理器核心执行的程序,改变驱动器的输出强度 存储器模块的信号和在模拟域中的操作,在存储器模块的端子处发出信号,例如在与存储器模块的电源连接上注入噪声。 存储器模块可以模拟多个可选择的存储器模块类型,并且可以包括完整的存储阵列以提供标准存储器模块操作。
    • 7. 发明申请
    • SYSTEM FOR REDUCING CROSS-TALK INDUCED SOURCE SYNCHRONOUS BUS CLOCK JITTER
    • 用于减少交叉输入源同步总线时钟抖动器的系统
    • US20080175327A1
    • 2008-07-24
    • US12058689
    • 2008-03-29
    • Bao G. TruongDaniel Mark DrepsAnand HaridassJohn C. SchiffJoel D. Ziegelbein
    • Bao G. TruongDaniel Mark DrepsAnand HaridassJohn C. SchiffJoel D. Ziegelbein
    • H04B3/00
    • H04L25/45
    • A first clock signal of frequency F is used to couple data to an off-chip driver (OCD) using a master/slave flip flop (FF), wherein the master latch is clocked with the first clock signal and the slave latch is clocked with the complement of the first clock signal. A second clock signal of frequency F/2 is generated from the first clock signal. The second clock signal is shifted a time equal to substantially one-half the cycle of the first clock signal. In one embodiment, the second clock is shifted using a delay line circuit. In another embodiment, the second clock is shifted using a master/slave FF, wherein the master latch is clocked with the complement of the first clock signal and the slave latch is clocked with the first clock signal. The logic state transitions of the data between edges of the propagating clock thereby reducing coupling to the clock transitions and thus reducing edge jitter.
    • 使用频率F的第一时钟信号用于使用主/从触发器(FF)将数据耦合到片外驱动器(OCD),其中主锁存器由第一时钟信号计时,从锁存器以 第一个时钟信号的补码。 从第一时钟信号产生频率为F / 2的第二时钟信号。 第二时钟信号被移位等于第一时钟信号的周期的大致一半的时间。 在一个实施例中,使用延迟线电路来移位第二时钟。 在另一个实施例中,使用主/从FF来移位第二时钟,其中主锁存器用第一时钟信号的补码进行计时,从锁存器用第一时钟信号计时。 传播时钟的边缘之间的数据的逻辑状态转换,从而减少与时钟转换的耦合,从而减少边缘抖动。