Patent ID: 6204724
Filing Date: 2001-03-20
Classification: G05F

Abstract:
A reference voltage generation circuit comprising:a first current mirror including first through third transistors of a first conductivity type, said first through third transistors having sources connected together and implementing a first output side, a reference side and a second output side, respectively, of said first current mirror;a second current mirror including fourth and fifth transistor of a second conductivity type opposite to said first conductivity type, said fourth and fifth transistors implementing a reference side and an output side, respectively, of said second current mirror, said fourth and fifth transistors being connected in series with said first and second transistors, respectively;first and second current sources connected in series with said second and fifth transistors and with said third transistor, respectively, for defining current flowing therethrough; anda voltage control block for controlling source-to-drain voltage of said first through third transistors within a specified range,the voltage control block comprising a sixth transistor of said second conductivity type having a source connected to a voltage source, a drain connected to the sources of said first through third transistors, and a gate fixed at a voltage corresponding to a sum of a threshold voltage of said first through third transistors and a threshold voltage of said fourth and fifth transistors.