| 摘要 |
A comparator circuit providing a hysteresis characteristic which does not change a hysteresis width even if a power supply voltage changes is disclosed. The comparator circuit comprises a differential amplifier including an input terminal, a reference terminal and an output terminal; an input voltage terminal to which an input voltage is applied; a reference voltage terminal to which a reference voltage is applied; at least one level shift means connected between said input voltage terminal and said input terminal, or between said reference voltage terminal and said reference terminal; a current source means connected to the output of said level shift means; and control means for controlling the current value of said current source means in accordance with the output level of said output terminal. |
