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    • 66. 发明公开
    • An asynchronous delay circuit
    • AsynchroneVerzögerungsschaltung。
    • EP0453083A1
    • 1991-10-23
    • EP91302029.3
    • 1991-03-11
    • MOTOROLA, INC.
    • Parsi, KavehHarnishfeger, David B.
    • H03K5/135
    • H03K5/135
    • A circuit for asynchronously delaying an input signal whereby the precision of the time delay is proportional to the precision of the clock. A first circuit (12) is coupled across a first capacitor (16) for charging the first capacitor to a predetermined voltage when the clock is in a first logic state and discharging the first capacitor when the clock is in a second logic state. A peak-hold circuit (20) having an input coupled to a first terminal of the first capacitor and an output signal at an output that provides a reference voltage representative of the peak voltage occurring at the input of the peak-hold circuit which is a function of the time interval the clock occupied the first logic state. A second circuit (30) is coupled across a second capacitor (26) for charging the second capacitor when the input signal is in a first logic state, and discharging the second capacitor when the input signal is in a second logic state. Also, a comparator (24) having a first input coupled to the output of the peak-hold circuit, a second input coupled to a first terminal of the second capacitor, and an output at which an output signal is provided that represents the input signal delayed by a predetermined time which is a function of the reference voltage.
    • 用于异步延迟输入信号的电路,由此时间延迟的精度与时钟的精度成正比。 第一电路(12)跨越第一电容器(16)耦合,用于当时钟处于第一逻辑状态时将第一电容器充电至预定电压,并且当时钟处于第二逻辑状态时,第一电路(12)被放电。 具有耦合到第一电容器的第一端子的输入端和输出端处的输出信号的峰值保持电路(20),其提供表示在峰值保持电路的输入处出现的峰值电压的参考电压,该峰值电压为 时钟占用第一个逻辑状态的时间间隔的功能。 当输入信号处于第一逻辑状态时,第二电路(30)跨越第二电容器(26)耦合,用于对第二电容器充电,并且当输入信号处于第二逻辑状态时,第二电路(30)放电第二电容器。 此外,具有耦合到峰值保持电路的输出的第一输入端的比较器(24),耦合到第二电容器的第一端子的第二输入端和提供表示输入信号的输出信号的输出端 延迟了作为参考电压的函数的预定时间。
    • 67. 发明公开
    • Precision timing circuit
    • Präzisionszeitschaltung。
    • EP0415047A2
    • 1991-03-06
    • EP90113404.9
    • 1990-07-13
    • International Business Machines Corporation
    • Woyke, Justin AldenBula, OrestKoch, Garrett StephenGomez, Richard Santiago
    • H03K5/135
    • H03K5/135
    • The present disclosure describes a clock circuit, together with a control current generator (11) and a ratio circuit (12) coupled thereto. The ratio circuit, of the invention, utilizes at least two capacitors (C1, C2) each of which is coupled in series with a respective transistor and arranged in parallel with one another. Each capacitor transistor pair is in parallel to the other and coupled between the control current generator and ground so that at least one of the transistors in a selected capacitor transistor series can be selectively turned off while the other can be directly controlled by the clock cycle.
      The present invention is thus a circuit, for generating timing edges within a clock cycle which timing edges can be any fraction of the clock cycle, which comprises a clock, a controlled current generator, and a ratio circuit coupled to the clock and the generator. The preferred embodiment of this invention comprises at least two capacitor-transistor pairs coupled in parallel between the generator and ground with the clock being coupled to the control electrode of one of the transistors and being coupled to the control electrode of the other transistor together with a turn-off signal source. Means (Q3, Q4) for discharging the capacitors are included in the circuit.
    • 本公开描述了与控制电流发生器(11)和耦合到其的比率电路(12)一起的时钟电路。 本发明的比率电路利用至少两个电容器(C1,C2),每个电容器与相应的晶体管串联耦合并彼此并联布置。 每个电容晶体管对彼此并联并耦合在控制电流发生器和接地之间,使得所选择的电容器晶体管串联中的至少一个晶体管可以选择性地截止,而另一个可以由时钟周期直接控制。 因此,本发明是用于在时钟周期内产生定时边沿的电路,其中定时边缘可以是时钟周期的任何分数,其包括时钟,受控电流发生器和耦合到时钟和发生器的比率电路。 本发明的优选实施例包括在发生器和地之间并联耦合的至少两个电容 - 晶体管对,其中时钟耦合到晶体管之一的控制电极,并连接到另一个晶体管的控制电极以及 关闭信号源。 用于放电电容器的装置(Q3,Q4)包括在电路中。
    • 69. 发明公开
    • Two stage synchronizer
    • Zweistufige Synchronisiereinrichtung。
    • EP0319184A1
    • 1989-06-07
    • EP88310990.2
    • 1988-11-21
    • TANDEM COMPUTERS INCORPORATED
    • Sanner,Martin W.
    • H03K5/135
    • H03K5/135
    • A method, and apparatus to implement that method, for synchronizing an incoming signal to the transitions of a digital clock signal in the form of a periodic pulse train. The apparatus includes a first circuit pair of flip-flops arranged to sample and store the state of the input signal on either the positive and negative transitions of the periodic pulse train, and OR gate producing a signal indicative of the stored content of the first circuit, and a third circuit that samples and stores the first signal at each transition of the periodic pulse train to produce therefrom a rep­resentation of the input signal synchronized to one of the transitions of the pulse train.
    • 一种实现该方法的方法和装置,用于使输入信号与周期性脉冲串形式的数字时钟信号的转换同步。 该装置包括第一电路对触发器,其布置成在周期性脉冲串的正向和反向转换上采样和存储输入信号的状态,以及OR门产生指示第一电路的存储内容的信号 以及第三电路,其在周期性脉冲串的每个转变处对第一信号进行采样和存储,从而产生与脉冲串的一个转换同步的输入信号的表示。
    • 70. 发明公开
    • Synchronizing circuit
    • 同步电路
    • EP0272653A3
    • 1989-03-08
    • EP87118866.0
    • 1987-12-18
    • KABUSHIKI KAISHA TOSHIBA
    • Okubo, Yasuo Patent DivisionHirasawa, Masataka Patent Division
    • H03K5/135
    • H03K5/135
    • A pulse signal transfer control circuit (TC) is located between an input pulse detecting circuit (11, 12, 13, 14) for detecting the arrival of an externally applied input pulse and outputting an pulse signal with a predetermined pulse width, and an R-S flip-flop (15). The transfer control circuit (TC) prohibits the pulse signal from being transferred to the R-S flip-flop (15) during a period in which the R-S flip-flop (15) is set, a period of generation of a first internal clock signal, and a period of generation of a second internal clock signal, and allows the pulse signal to be transferred to the first R-S flip-flop (15) during period in which the first and second clock signals are not generated and the period in which the first R-S flip-flop (15) is reset.
    • 脉冲信号传输控制电路(TC)位于用于检测外部施加的输入脉冲的到达并输出具有预定脉冲宽度的脉冲信号的输入脉冲检测电路(11,12,13,14)和RS 触发器(15)。 传输控制电路(TC)在RS触发器(15)置位的时段期间禁止脉冲信号传输到RS触发器(15),产生第一内部时钟信号的时段, 和产生第二内部时钟信号的周期,并且允许脉冲信号在没有产生第一和第二时钟信号的周期期间将第一RS触发器(15)传送到第一RS触发器 RS触发器(15)复位。