MEMORY ELEMENT, PROCESSING SYSTEM, METHOD FOR CONTROL OF MEMORY ELEMENT AND METHOD FOR OPERATION OF DYNAMIC RANDOM-ACCESS MEMORY

    公开(公告)号:JPH0973772A

    公开(公告)日:1997-03-18

    申请号:JP29148395

    申请日:1995-11-09

    Abstract: PROBLEM TO BE SOLVED: To provide a memory device of a wide bus width with a small pin number by multiplexing the input of the memory device, receiving address bitso during a certain operation cycle and receiving data bits during a different operation cycle. SOLUTION: Addresses from a dedicated address pin 220 and the addresses from a multiplex pin 230 through a multiplexer 206 are delivered to an address latch 207. Also, data from a dedicated data pin 240 and the data from the multiplex pin 230 through the multiplexer 206 are transferred to a data latch 208. In the case of write to a DRAM cell array 201, the addresses are sent in a period when a low address strobe RAS is inactive and the data are transferred in the period when it is active. Thus, without increasing the number of pins, and address port provided with the wider bus width is obtained.

    INTEGRATED CIRCUIT USING PROGRAMMABLE TILE

    公开(公告)号:JPH0221638A

    公开(公告)日:1990-01-24

    申请号:JP5949989

    申请日:1989-03-10

    Abstract: PURPOSE: To achieve high integration by tiling sub-gates and other subfunctional elements in an SLA using a set of static CMOS tile such that individual units can be modified by mass programming technology. CONSTITUTION: Individual tiles of a CMOS cell set are mapped onto one or a plurality of grids of a memory logic array. In an odd row, the grid comprises four horizontal signal wires O, Y, C and U provided on a lower metal film, four vertical signal wires B, G, R and P provided on an upper metal film, and a power supply wire Vdd and an earth wire GND extending along the left and right edges. In an even row, the vertical wire, the power supply wire Vdd and the earth wire GND are reversed. The grid is designed to be superposed on an adjacent grid in the same row while sharing the power supply wire Vdd and the earth wire GND between adjacent grids. According to the method, modification can be facilitated significantly when an existing design is repaired or improved using a software design tool.

    Quantizer overload prevention of feedback delta-sigma modulator

    公开(公告)号:JP2009503930A

    公开(公告)日:2009-01-29

    申请号:JP2008522836

    申请日:2006-07-13

    CPC classification number: H03M7/3035 H03M7/3026 H03M7/3028 H03M7/304

    Abstract: デジタル信号処理システムは、量子化器の過負荷防止状態の間にはローパス出力を維持する、デルタシグマ変調器を含む。 少なくとも1つの実施形態において、該デルタシグマ変調器は、N次のフィードバック型ループフィルタを有する、量子化器の過負荷から保護されたデルタシグマ変調器を含む。 該デルタシグマ変調器の量子化器は、ループフィルタの少なくとも最初の2つのフィルタステージに、フィードバックを提供する。 ループフィルタは、少なくともN個の連続したフィルタステージを含み、量子化器の過負荷防止状態の間には、最初のフィルタステージの出力を制限する。 最初のフィルタステージの出力制限が量子化器の過負荷防止に不十分である場合には、該デルタシグマ変調器は少なくとも後続のフィルタステージの出力を漸進的に制限し、量子化器の過負荷を防ぐことができる。 ここで、Nは2に等しいか、または2よりも大きい正の整数である。

    Digitally filtered pulse width modulation
    88.
    发明专利
    Digitally filtered pulse width modulation 审中-公开
    数字滤波脉宽调制

    公开(公告)号:JP2008136202A

    公开(公告)日:2008-06-12

    申请号:JP2007284558

    申请日:2007-10-31

    CPC classification number: H03M3/372 H03M3/506

    Abstract: PROBLEM TO BE SOLVED: To solve the problem that a continuous time output stage of a DAC (digital to analog converter) requires a method of minimizing inter-symbol interference and improving effects of clock characteristics.
    SOLUTION: The digital to analog converter (Fig 1A) includes a noise shaping modulator (102) for modulating an input digital data stream (101), a plurality of output elements (103) for generating a plurality of intermediate data streams from a modulated output stream from the modulator, and an output summer (106) for summing the intermediate data streams to generate an output analog stream. The noise shaping modulator balances an edge transition rate of the output elements so that the edge transition rate of two selected elements is approximately equal.
    COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 解决问题:为了解决DAC(数模转换器)的连续时间输出级需要一种使码元间干扰最小化和改善时钟特性的方法的问题。 解决方案:数模转换器(图1A)包括用于调制输入数字数据流(101)的噪声整形调制器(102),用于产生多个中间数据流的多个输出元件(103) 来自调制器的调制输出流,以及用于对中间数据流求和以产生输出模拟流的输出加法器(106)。 噪声整形调制器平衡输出元件的边沿跃迁速率,使得两个选择的元件的边沿跃迁速率近似相等。 版权所有(C)2008,JPO&INPIT

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