| 摘要 |
PURPOSE:To add a desired hysteresis characteristic to each threshold level, by adding comparing outputs corresponding to plural threshold levels of a comparator, and applying them with positive feedback. CONSTITUTION:Comparing outputs 3a, 3b-corresponding to different threshold levels of a comparator 1 are fed back in positive phase through an adder 4, and as for the comparator 1, a hysteresis characteristic is added as to each threshold level. In accordance with setting of a coefficient, etc. in case of addition by this adder 4, the hysteresis width to each threshold level attains a desired value, and a desired hysteresis characteristic is added, and operation of the comparator does not become unstable even in case of a variation of an electric power supply, etc., but stabilized at all times. |
