VARIABLE VOLTAGE REFERENCE GENERATOR AND ANALOG-TO-DIGITAL CONVERTER USING THEREOF

摘要

PURPOSE: A variable reference voltage generation circuit and an analog-to-digital converter including the same eliminate the need for a low-voltage transistor because a voltage margin from a ground voltage or a power voltage is always the same with a fixed common mode voltage, thereby reducing manufacturing costs. CONSTITUTION: A variable reference voltage generation circuit includes a level shifter (100) generating a first reference voltage and a second reference voltage converted from a control voltage which is input and a voltage driver (200) generating a third reference voltage and a fourth reference voltage converted from the first reference voltage and the second reference voltage which are input, respectively. The first reference voltage and the second reference voltage are complementary to each other.