Patent attributes
Provided is a reference current circuit able to reduce temperature dependence of the reference current even in a case of using a resistor with extremely low temperature-dependent resistance. The reference current circuit comprises a non-inverting amplifier circuit 110 receiving a temperature-compensated reference voltage VBG and generating a voltage Vout1 at an output point; a current source circuit 120 composed of a transistor Q1 connected to the output point via a resistor and a transistor Q2 receiving a voltage equal to a voltage VBE1 generated across terminals of Q1 and generating a corresponding current. The circuit 110 (i) includes a third transistor Q3, a voltage VBE3 generated across terminals of which has the same temperature characteristic as the voltage VBE1, and (ii) is configured such that Vout1 is a sum of (a) a temperature-compensated voltage component based on VBG and (b) a voltage component equal-to-the voltage VBE3.
