DIGITAL/ANALOG CONVERTER

摘要

The error compensation circuit compensates the process variation using electric current to improve the density of a semiconductor. The circuit includes : a coarse bit decoder(10) outputting a driving control signal after decoding the upper M bits of a digital signal of K bits; a current scaler(20) outputting current according to the driving control signal; a current/voltage transformer(30) changing the current to a correspondent voltage; a voltage elevator(40) selecting and outputting a coarse bit step of the analog coarse bit step from the transformer(30); a voltage distributer(50) dividing the voltage by 2N and outputting the correspondent voltage of it; a current compensate unit(60) controlling the current supply; and a fine bit decoder(70) decoding the lower N bits of the digital signal of K bits to output a driving control signal as a switching control signal of the voltage distributer(50).