| 摘要 |
PROBLEM TO BE SOLVED: To provide an input voltage range monitoring circuit capable of identifying whether a differential input signal voltage is within a normal range or an abnormal range. ! SOLUTION: An input voltage range monitoring circuit includes: first to fourth comparators for comparing a differential input signal voltage with standard values including a first reference high voltage and a first reference low voltage, and actual values of a differential input buffer including a second reference high voltage and a second reference low voltage, respectively; and an input voltage range detection circuit for detecting an input voltage range of a differential input signal voltage within either a first input voltage range higher than the second reference high voltage, a second input voltage range lower than the second reference high voltage and higher than the first reference high voltage, a third input voltage range lower than the first reference high voltage and higher than the first reference low volta |
