Reference voltage generation circuit and semiconductor device

Abstract

A reference voltage generation circuit for generating a stable reference voltage when power is turned on or the like is provided. The reference voltage generation circuit of the present invention includes: a BGR circuit that generates a current utilizing a bandgap of a diode-connected bipolar transistor in a first current path; a voltage generation part that replicates the current in a second current path and generates a reference voltage based on the current; and a resistor control part that controls resistance values of a variable resistor in the first current path and a variable resistor in the second current path. The resistor control part makes the resistance values of the variable resistors to be smaller than those during a normal operation when a power voltage is supplied, thereby increasing current capacity flowing in the first current path and the second current path, and suppressing overflow of the reference voltage caused by an inrush current.

Dependencies are inferred from the claim text.