公开(公告)号：US3739374A

公开(公告)日：1973-06-12

申请号：US3739374D

申请日：1971-08-27

Applicant: MANDREL INDUSTRIES

Inventor： KIOWSKI J

IPC: G01V1/04 ,  G06F1/035 ,  H03B23/00

CPC classification number: G01V1/04 ,  G06F1/0353 ,  H03B2200/0092

Abstract: A digital sweep generator for digitally generating an analog since wave signal of constant or varying (sweep) frequency, includes means for generating a rate-of-change clock, a slope clock and a sine function, via digital circuits. The rate-ofchange clock determines the rate-of-change in the frequency of a sinewave across a desired range of frequencies for a given time interval. The slope clock occurs at the exact increments selected to produce a given sinewave frequency as determined by the rateof-change clock. That is, if a sweep sinewave signal is desired, the rate-of-change clock is introduced to modify accordingly the means for generating the slope clock. The slope clock is then introduced to the means for generating a sine function to digitally produce the sinewave signal as the function of the input slope clock rate. Each slope clock represents a point on the slope of the generated sinewave, corresponding to equal increments of 360* of a sinewave. Two outputs are provided; a digital word corresponding to the sinewave, and the analog sinewave signal delivered therefrom via a digital-to-analog converter.

Abstract translation: 数字扫描发生器，用于数字地产生模拟信号，因为波形信号恒定或变化（扫描）频率，包括通过数字电路产生变化率时钟，斜率时钟和正弦函数的装置。 变化率时钟确定在给定时间间隔内在期望频率范围内正弦波的频率的变化率。 斜率时钟以选择的精确增量发生，以产生由变化率时钟确定的给定正弦波频率。 也就是说，如果需要扫描正弦波信号，则引入变化率时钟以相应地修改用于产生斜率时钟的装置。 然后将斜率时钟引入到用于产生正弦函数的装置，以数字产生正弦波信号作为输入斜率时钟速率的函数。 每个斜率时钟表示所生成的正弦波的斜率上的点，对应于正弦波的360°的相等增量。 提供两个输出; 对应于正弦波的数字字，以及经由数模转换器从其发送的模拟正弦波信号。