| 摘要 |
PROBLEM TO BE SOLVED: To provide a window comparator device capable of improving the determination accuracy, relative to the magnitude of the voltage value of an input signal, as well as, miniaturizing its physical size. SOLUTION: This window comparator device 1 is equipped with a constant voltage source Vcc and resistors R11-R16 as reference voltage value generating parts for generating reference voltage values 'V11-V15'. The device 1 is also equipped with a comparator BC1 for determination for comparing a reference voltage value "V11" or "V14" with the voltage value of the input signal; a comparator BC2 for determination for comparing a reference voltage value "V12" or "V15" with the voltage value of the input signal, and a comparator SC11 for switching for comparing a reference voltage value "V13", with the voltage value of the input signal. The device 1 is further equipped with a switching circuit for switching each determination value from the comparators BC1 and BC2 for determination through analog switches AS11-AS14, based on a comparison result from the comparator SC11 for switching. COPYRIGHT: (C)2008,JPO&INPIT
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