| 摘要 |
PROBLEM TO BE SOLVED: To make a liquid crystal driving circuit, in which an analog signal is selectively inputted to bit cells being plural outputs by analog multiplexers in an analog signal line, high in its driving speed and multiple in its output. SOLUTION: The analog signal AS1 inputted from an analog signal input terminal 2 is inputted to two analog multiplexers 31, 32. Analog signals AS11, AS12 being their outputs are inputted respectively to n-output bit cells which are divided into halves and the signals are subjected to sample-and-hold at insides of the bit cells to be outputted via buffers. The multiplexers 31, 32 are changed over so as to time-sharingly operate by an analog multiplexer control circuit 5 and they are controlled so that when the analog multiplexer of one side operates and the inputting of its output signal to the n-output bit cells 4 is completed, the analog multiplexer of other side starts its operation.
|
