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    • 6. 发明专利
    • SETTING SYSTEM FOR DELAY CLOCK
    • JPS60162960A
    • 1985-08-24
    • JP1881384
    • 1984-02-02
    • FUJITSU LTD
    • HASHIMOTO SHIYUUICHI
    • G01R13/28G01R13/20G06F1/04H03K23/58H03K23/66
    • PURPOSE:To increase a delay interval by providing separately a delay clock which has a longer period than a sampling clock. CONSTITUTION:When an FF circuit F turns on, a counting circuit CNT2 added separately is enabled as well as an original counting circuit CNT1. Consequently, the circuit CNT1 starts counting the clock CLOCK2 at the same time. An operator sets the number of delay clocks to terminals D0-Dn of the circuit CNT2 as well as the circuit CNT2 before measuring operation, and the circuit CNT2 generates an output signal when its counted value attains to the set number of delay clocks. A clock CLOCK2 is generated by dividing the frequency of a clock CLOCK1, so the output of the circuit CNT2 and the output signal of the circuit CNT1 are generated at the same time. Therefore, they are ANDed by an AND gate G to obtain a memory write end signal. Further, the circuit CNT1 continues to count until the circuit CNT2 finishes counting. Consequently, a delay time is increased without decreasing sampling density.
    • 8. 发明专利
    • CLOCK INTERRUPTION DETECTING CIRCUIT
    • JPS60103723A
    • 1985-06-08
    • JP21120583
    • 1983-11-10
    • FUJITSU LTD
    • HASHIMOTO SHIYUUICHI
    • H03K5/19G06F1/04
    • PURPOSE:To output a clock disconnection signal for the period of a clock pulse number during disconnecting period by constituting the circuit with a monostable multivibrator, a delay circuit, an AND circuit and a set/reset flip-flop and using an output of the flip-flop as the clock disconnection signal. CONSTITUTION:The monostable multivibrator OM is constituted by connecting a capacitor CM and a resistor RM to terminals C, R. Since an output signal 5 is extacted from a terminal MQ', the signal is an inverting signal of an output signal 3 at a terminal MQ. The output signal 5, a signal 6 delaying the output signal 3 at the terminal MQ by a delay circuit DL and a clock signal 1 are inputted to the NAND gate NA. An output signal 7 and the clock signal 1 of the NAND gate NA are fed respectively to terminals S and R of a set/reset flip-flop SRF, the clock disconnection signal 8 is outputted from a terminal SRQ so as to display clock disconnection.
    • 9. 发明专利
    • HOLDING TYPE REGISTER ACCESS SYSTEM
    • JPS59231647A
    • 1984-12-26
    • JP10713883
    • 1983-06-15
    • FUJITSU LTD
    • HASHIMOTO SHIYUUICHI
    • G06F5/06G06F13/38G06F13/40
    • PURPOSE:To extract repeatedly data by providing a tri-state buffer and specifying a single address through a data receiving bus. CONSTITUTION:One-word data d1-dn from a data transmitting bus 1 are transmitted to holding type registers 5-1-5-n together with respective fed addresses a1-an and n-word data d1-dn are stored in the registers 5-1-5-n. In this state, when only one kind of address (a) and a data extraction indication supplied from the data receiving bus 2 to the registers 5-1-5-n in common are sent out once, an access signal C drives the counting circuit CNT in a control part 6 once to output logic 1 from a terminal Q0 and logic 0 from terminals Q1-Qm. Consequently, a decoder DCR outputs an enable signal en1 from a terminal 01 to energize a tri- state buffer 7-1. Then, the register 5-1 is connected to the data receiving bus 2 to allow the stored data d1 to be extracted. Similarly, data are extracted successively up to the holding type register 5-n.
    • 10. 发明专利
    • Digital filter
    • 数字滤波器
    • JPS57123716A
    • 1982-08-02
    • JP864681
    • 1981-01-23
    • Fujitsu LtdNippon Telegr & Teleph Corp
    • HASHIMOTO SHIYUUICHIYASUI YUTAKAITAKURA FUMITADASAGAYAMA SHIGEKI
    • H03H17/02H03H17/04
    • H03H17/0461
    • PURPOSE:To eliminate the influence of an overflow by constituting a multiplier which performs continuous arithmetic regarding only significant data length without any excessive bit, and inserting 0 into the contents of a register in accordance with the number of parameters on detecting an overflow of the arithmetic result. CONSTITUTION:A digital filter consists of a multiplier MPL, an adder (+), a subtracter (-), delay registers DR1-DR3, a partialsum register REG, and a register ZR, and performs digital arithmetic processing on pipeline basis. The MPL is constituted by cascading an initial-stage module, a basic module, a discarding module, and a final-stage module, and performs continuous arithmetic regarding only significant data length without any excessive bit. A control circuit DCNT when detecting an overflow of the arithmetic result at the final stage of an arithmetic loop sends 0 to close gates G1-G6, thereby inserting the 0 into the DR1-DR3 only in a period which corresponds to parameters. The coefficients F of the MPL are inputted successively on time-division mode, and an input L(t) and timing are adjusted by the register ZR, thereby sending an output W(t) from a gate G3 synchronously with an output synchronizing signal SYN.
    • 目的:通过构成一个乘法器来消除溢出的影响,该乘法器只对有效的数据长度进行连续运算而没有任何过多的位,并根据检测到算术溢出的参数数将0插入到寄存器的内容中 结果。 构成:数字滤波器由乘法器MPL,加法器(+),减法器( - ),延迟寄存器DR1-DR3,偏置寄存器REG和寄存器ZR组成,并且以流水线为基础进行数字运算处理。 MPL通过级联初始模块,基本模块,废弃模块和最后一级模块构成,并且仅对重要数据长度进行连续运算,而不会有任何过多的位。 控制电路DCNT在运算循环的最后一级检测到运算结果的溢出时,向闭合门G1-G6发送0,从而仅在对应于参数的周期内将0插入到DR1-DR3中。 在时分模式下连续输入MPL的系数F,通过寄存器ZR调整输入L(t)和定时,从而与输出同步信号SYN同步地从门G3发送输出W(t) 。