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一、四斜积分式模—数转换器(A、D、C)的37.作原理迄今为止,实现模拟量转换成数字量的方法很多。其中传统的比较式和独具特点的积分式ADC原理仍在被广泛的采用.尤其是在测量仪表中,单片集成的双积分ADC使得仪器仪表可制成微型化。所谓“四斜积分式是指ADC的核心单元—积分器,在不同的时间里所做的四次不同的积分运算,从而求得一个与被测信号成正比的时间间隔,并在此时间间隔里对一钟频脉冲计数,所计脉冲多少即表征了被测模拟量的大小,以此则可完成模拟——数字的转换。它实质上,还是双积分式ADC的扩展和演变。
One, four oblique integral analog-digital converter (A, D, C) 37. Principle So far, there are many ways to achieve analog to digital conversion. One of the traditional comparative and unique features of the integral ADC principle is still widely used.Especially in measuring instruments, monolithic integrated dual-integral ADC makes the instrument can be made into a miniaturized. The so-called "four-slope integral refers to the ADC’s core unit - integrator, at different times to do four different integral operations, so as to obtain a signal proportional to the time interval and in this time interval In a clock frequency pulse count, the number of pulses that characterize the size of the measured analog, which can be completed analog - digital conversion. It is essentially, or double integral ADC expansion and evolution.