Transcription of Analog Integrated Circuit Design 2nd Edition
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Analog Integrated Circuit Design 2nd Edition
Comparators Chapter 10 Introduction The second most widely used Circuit block are comparators after OpAmps. They are used extensively in A/D converters and other signal processing applications. Input offset and noise The input offset voltage of a comparator is the input voltage at which its output changes from one logic level to the other. It may be caused by device mismatch or may be inherent to the Design of a comparator. Random Circuit noise can cause the output to change from one logic level to the other, even when the comparator input is held constant. Hence, in order to measure the input offset voltage in the presence of Circuit noise, one would look for the input voltage that results in the output stage of the comparator being high and low with equal likelihood. The input referred noise is then observed by changing the input around this value using output statistics assuming for example Gaussian distributions.
to the design of a comparator. Random circuit noise can cause the output to change from one logic level to the other, even when the comparator input is held constant. Hence, in order to measure the input offset
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