TIME DIVISION SAMPLING DAC FOR FLAT PANEL DISPLAY DRIVERS AND EMBODIMENT METHOD OF IT AND DATA DRIVING CIRCUIT USING OF IT

摘要

A flat panel display driving DAC(Digital-Analog Circuit) using time-division sampling, a forming method thereof, and a data driving circuit using the same are provided to increase precision and to reduce the size of a driving chip by reducing the size of a MUX(Multiplexer) by 1/2^(n-n/k). A flat panel display driving DAC using time-division sampling includes a timing signal generating unit(110) supplying an operation timing of each part of a circuit or generating a timing signal matching synchronization; a data selection unit(120) receiving digital data of n-bit, splitting the digital data into a predetermined number of groups, and outputting digital input data split according to the timing signal sent from the timing signal generation unit; reference signal generating units(130-1~130-k) divided into a predetermined number of groups to output 2^n/k analog reference signals; a reference signal selection unit(150) outputting only 2^n/k analog reference signals selected according to the timing signal output from the timing signal generating unit by using the output of the reference signal generating unit as an input value; a MUX(160) outputting one of the reference signals input from the reference signal selection unit by using n/k-bit digital data input from the data selection unit as a control input value; and a sampling mode analog adding unit(170) sampling and storing the output of the MUX according to the timing of the timing signal generating unit.