Patent ID: 9671811
Date: 2017-06-06
CPC Classifications: G05F

Claim:
1. A low-power bandgap reference voltage generator using a leakage current, comprising: a medium voltage generation unit configured to generate a medium voltage based on the absolute temperature, using a leakage current; a low power amplifier configured to amplify the medium voltage and outputting an operational amplification voltage; and a reference voltage output unit configured to output a reference voltage based on the operational amplification voltage at a target level, wherein the low power amplifier comprises: a bias circuit unit configured to output a bias voltage; a first input stage configured to amplify a feedback voltage to the target level; a second input stage configured to amplify the medium voltage outputted from the medium voltage generation unit to the target level; and an operational amplification unit configured to amplify the voltage outputted from the first input stage and the second input stage, and output the operational amplification voltage, wherein the bias circuit unit comprises: first to third PMOS transistors of which gates and sources are commonly coupled, and which are coupled in series between a supply voltage and the bias voltage; and third to fifth NMOS transistors of which gates are commonly coupled, and which are coupled in series between the bias voltage and a ground terminal.