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220 条记录 (耗时 0.013 秒)

    Method for digital voltage controlled oscillator
    71.
    发明授权
    Method for digital voltage controlled oscillator 失效
    数字压控振荡器的方法

    公开(公告)号：US4672568A

    公开(公告)日：1987-06-09

    申请号：US620993

    申请日：1984-06-15

    申请人： David M. Taylor

    发明人： David M. Taylor

    IPC分类号： H03B28/00 ,  G06F7/548 ,  H03K4/02 ,  H03K4/94 ,  G06F15/31

    CPC分类号： H03K4/026 ,  G06F7/548

    摘要： A method for approximating a continuous range of signals having sinusoidal waveforms with signals having trapezoidal waveforms, and for generating a continuous range of frequencies around a given center frequency. The method forms trapezoidal waveforms by a computational technique. A periodic triangular waveform is first formed by repetitiously adding and subtracting an amplitude increment at a succession of time intervals. The time intervals can be large, thereby allowing a low sampling frequency. The peaks of the triangular waveform are truncated to form the trapezoidal waveform. The method can be easily implemented within a standard arithmetic logic unit (ALU) structure.

    摘要翻译： 一种用于近似具有正弦波形的信号的连续范围的方法，其具有梯形波形的信号，并且用于产生围绕给定中心频率的连续的频率范围。 该方法通过计算技术形成梯形波形。 首先通过在连续的时间间隔上重复地增加和减去振幅增量来形成周期性的三角波形。 时间间隔可能很大，从而允许低采样频率。 三角波形的峰值被截断以形成梯形波形。 该方法可以容易地在标准算术逻辑单元（ALU）结构内实现。

    Function generator
    72.
    发明授权
    Function generator 失效
    函数发生器

    公开(公告)号：US4511882A

    公开(公告)日：1985-04-16

    申请号：US394563

    申请日：1982-07-02

    申请人： Marion A. Keyes, IV ,  William L. Thompson

    发明人： Marion A. Keyes, IV ,  William L. Thompson

    IPC分类号： G06F1/02 ,  G06F1/035 ,  G06F7/548 ,  G06F17/17 ,  H03K13/24

    CPC分类号： G06F1/035

    摘要： A function generator producing an output signal varying in predetermined non-linear relationship to an input signal wherein the input signal addresses a programmable read-only memory (PROM) which is programmed to produce readout signals linearly proportional to selected values of the input signal and readout signals corresponding to the predetermined non-linear function of the input signal at said selected values and the output signal is derived by interpolation between the consecutive selected input signals which bracket the input signal.

    摘要翻译： 产生与输入信号以预定的非线性关系变化的输出信号的函数发生器，其中所述输入信号寻址可编程只读存储器（PROM），所述可编程只读存储器被编程为产生与输入信号的选定值成线性比例的读出信号和读出 在所选择的值处与输入信号的预定非线性函数相对应的信号，并且通过插入输入信号的连续选择的输入信号之间的内插导出输出信号。

    Polyphasor generation by vector addition and scalar multiplication
    73.
    发明授权
    Polyphasor generation by vector addition and scalar multiplication 失效
    通过矢量添加和标量多项式的多边形生成

    公开(公告)号：US3725686A

    公开(公告)日：1973-04-03

    申请号：US3725686D

    申请日：1971-01-29

    申请人： HUGHES AIRCRAFT CO

    发明人： USTACH G

    IPC分类号： G06F7/548 ,  G06F17/16 ,  H03H17/08 ,  G06F7/38 ,  G06G7/22

    CPC分类号： G06F7/548 ,  G06F17/16 ,  H03H17/08

    摘要： Herein is disclosed the method and apparatus for producing angular rotations of an input signal (phasor). The method involves phase shifting the input signal by a preselected amount, vectorially adding the input and the phase shifted signals, and then adjusting the amplitude of the sum phasor by a scalar multiplication operation. The addition and multiplication steps are repeated in a plurality of subsequent processing operations whereby various combinations of phasor signals produced during preceding steps are summed and amplitude adjusted to obtain a set of output signals having preselected phase values.

    摘要翻译： 这里公开了用于产生输入信号（相量）的角旋转的方法和装置。 该方法包括将输入信号相移预定量，向量相加输入和相移信号，然后通过标量相乘运算来调整和相量的振幅。 在多个后续处理操作中重复加法和乘法步骤，由此在前面的步骤中产生的相量信号的各种组合被相加和幅度调整以获得具有预选相位值的一组输出信号。

    Digital differential analyzer
    75.
    发明授权
    Digital differential analyzer 失效
    数字差分分析仪

    公开(公告)号：US3564223A

    公开(公告)日：1971-02-16

    申请号：US3564223D

    申请日：1968-06-04

    申请人： NAT RES DEV

    发明人： HARRIS ROBERT HERBERT ,  OWEN PHILLIP LANCE

    IPC分类号： G06F7/548 ,  G06F7/64 ,  G06F15/34

    CPC分类号： G06F7/548 ,  G06F7/64

    摘要： A digital differential analyzer is arranged to compute the sum of the first n terms of a Taylor series representing a function of an independent variable where n is an odd integer greater than unity. It includes means for detecting changes in the independent variable and comparing them with two or more standard increment sizes and calculating the effect of an increment of the nearest standard increment size on the value of the function. A specific example for calculating sin theta and cos theta is described.

    Transcendental function generator
    76.
    发明授权
    Transcendental function generator 失效
    横向功能发电机

    公开(公告)号：US3562714A

    公开(公告)日：1971-02-09

    申请号：US3562714D

    申请日：1967-09-07

    申请人： RCA CORP

    发明人： MIILLER HENRY S ,  LINHARDT ROBERT J

    IPC分类号： G06F7/548 ,  G06F7/39

    CPC分类号： G06F7/548

    摘要： A TRANSCENDENTAL FUNCTION GENERATOR APPARATUS FOR TWOPART EVALUATION OF SINE AND COSINE FUNCTIONS, AS WELL AS OTHER FUNCTIONS, IS DESCRIBED. THE FIRST OF THE TWO PARTS RESEMBLES A DIVISION-LIKE ITERATION, WHILE THE SECOND OF THE TWO PARTS RESEMBLES A MULTIPLICATION-LIKE ITERATION. THE GENERATOR IS IMPLEMENTED WITH A STORAGE UNIT AND A TRANSCENDENTAL FUNCTION CONTROL UNIT.