Patent ID: 7313048
Filing Date: 2007-12-25
Classification: H03K

Abstract:
1. A reset detection circuit for a logic circuit comprising: a first power supply line that supplies a first voltage; and a second power supply line that supplies a second voltage; a first determining means that operates with the first voltage and determines whether the second voltage is equal to or higher than a reset voltage for the logic circuit; a second determining means that operates with the first voltage and determines whether the first voltage is equal to or higher than a minimum operating voltage as a guarantee voltage for an operation of the first determining means; and a reset signal generating means that releases reset of the logic circuit when the first determining means determines that the second voltage is equal to or higher than the reset voltage for the logic circuit and at the same time the second determining means determines that the first voltage is equal to or higher than the minimum operating voltage, and outputs a reset signal for resetting the logic circuit when the first determining means determines that the second voltage is lower than the reset voltage for the logic circuit or the second determining means determines that the first voltage is lower than the minimum operating voltage.