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A LOW COST ANALOG TO DIGITAL CONVERTER AND A METHOD FOR CONVERTING AN ANALOG SIGNAL TO A DIGITAL SIGNAL
A LOW COST ANALOG TO DIGITAL CONVERTER AND A METHOD FOR CONVERTING AN ANALOG SIGNAL TO A DIGITAL SIGNAL
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机译:一种低成本的模拟数字转换器以及将模拟信号转换为数字信号的方法
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摘要
The present invention relates to a low cost analog to digital converter (ADC) and a method for converting an analog signal to a digital signal. The method includes the steps of: outputting a pulse modulation signal according to a digital value; performing a low-pass filtering to the pulse modulation signal to obtain a pulse averaged voltage; mixing a first proportion of the pulse averaged voltage and a second proportion of a voltage under test to obtain a composite voltage; comparing the composite voltage with a threshold voltage and adjusting the first digital value such that the composite voltage approaches the threshold voltage; and performing a complement operation to the digital value to obtain an analog to digital value corresponding to the voltage under test.
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