Patent ID: 6559718
Filing Date: 2003-05-06
Classification: H03F

Abstract:
A semiconductor integrated circuit device comprising:an inverted input terminal; a noninverted input terminal; a differential amplifier circuit having a differential amplifier stage with an inverted input node and a noninverted input node; a first filter circuit between the inverted input terminal and the inverted input node of the differential amplifier stage, having a cut-off frequency which is higher than a cut-off frequency of the differential amplifier circuit but is lower than a cut-off frequency of a parasitic filter circuit including a parasitic capacity and a parasitic resistance in an input unit of the differential amplifier circuit; and a second filter circuit between the noninverted input terminal and the noninverted input node of the differential amplifier stage, having a cut-off frequency which is higher than the cut-off frequency of the differential amplifier circuit but is lower than the cut-off frequency of a parasitic filter circuit including a parasitic capacity and a parasitic resistance in the input unit of the differential amplifier circuit.