Patent ID: 7098729
Filing Date: 2006-08-29
Classification: G05F

Abstract:
1. A band gap circuit for generating an output voltage to be outputted from a circuit output terminal, which is connected to a power supply voltage source and a reference potential point, said band gap circuit comprising: a differential amplifier having an inverting input terminal, a noninverting input terminal, and an output terminal; a first circuit for causing a potential difference to occur at said inverting input terminal and said non inverting input terminal in response to fluctuation of the voltage on said circuit output terminal, said first circuit including a first element comprising an ion implantation resistor having a capacitive component; a switching element for causing excess current from said circuit output terminal to flow to said reference potential point in response to fluctuation of potential at said output terminal of said differential amplifier, said switching element being connected to said circuit output terminal and said reference potential point and being directly connected to said output terminal of said differential amplifier; and a second element having a resistive component, wherein: said first and second elements are connected to remove power supply noise in the power supply voltage source.