Patent ID: 7262649
Filing Date: 2007-08-28
Classification: H03K

Abstract:
1. A comparator comprising: a differential amplification circuit having an output node for outputting a voltage, a pair of differential input transistors, and a pair of load transistors having bases coupled to each other, the load transistors being connected between the differential input transistors and a power line; an output transistor having a base connected to the output node of the differential amplification circuit and an emitter connected to the power line; a current output circuit for outputting an electric current; a diode having a cathode connected to the power line to allow the current outputted from the current output circuit to flow into the power line; a first resistor connected between the current output circuit and the output transistor; a second resistor connected between the current output circuit and an anode of the diode; and a third resistor connected between the anode of the diode and the bases of the load transistors.