{HEAD ~ The AD converter} includes: an arithmetic operation amplifying circuit unit, {TAIL ~ a comparator circuit unit} for comparing, with a reference signal, an output from the arithmetic operation amplifying circuit unit; a DA converted circuit unit for DA converting a signal based on a signal from the comparator circuit unit; and a sampling and holding unit arranged at an input section of the arithmetic operation amplifying circuit unit 
includes
{ HEAD ~ The AD converter } includes : an arithmetic operation amplifying circuit unit , { TAIL ~ a comparator circuit unit } for comparing , with a reference signal , an output from the arithmetic operation amplifying circuit unit ; a DA converted circuit unit for DA converting a signal based on a signal from the comparator circuit unit ; and a sampling and holding unit arranged at an input section of the arithmetic operation amplifying circuit unit
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