COMPARATOR, DC-DC CONVERTER, AND ORGANIC LIGHT EMITTING DISPLAY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a DC-DC converter with an improved signal response characteristic and reduced power consumption and to provide an organic light emitting display using the converter.

SOLUTION: A comparator is disclosed that receives an input voltage and a reference voltage and determines an output corresponding to a difference between the input voltage and the reference voltage. The comparator includes: an input unit configured to transmit the input voltage Vin to a first terminal and to transmit the reference voltage Vref and a voltage corresponding to a feedback voltage via a capacitor C13 to a second terminal; an amplification unit including at least one inverter M11 to M16 configured to operate according to the input voltage transmitted to the first terminal, to the input voltage and the reference voltage transmitted to the second terminal; a negative feedback unit configured to receive a voltage output in the amplification unit so as to generate a feedback voltage and to transmit the generated feedback voltage to the input unit so as to control the voltage transmitted to the amplification unit; and an output unit (out) configured to receive and output the output voltage of the amplification unit.

COPYRIGHT: (C)2007,JPO&INPIT