Patent ID: 6522280
Filing Date: 2003-02-18
Classification: H03M

Abstract:
A digital-to-analog converter comprising:a more significant data converting device that converts more significant bit data of digital data into a more significant analog signal corresponding to said more significant bit data by using an adjustable reference voltage inputted from outside; a less significant data converting device that converts less significant bit data of the digital data into a less significant analog signal corresponding to said less significant bit data wherein said less significant data converting device comprises a current output device that outputs a less significant analog current signal having a current corresponding to said less significant bit data; a control device that controls said less significant data converting device in such a manner as to output said less significant analog signal according to said adjustable reference voltage wherein said control device comprises a regulating device that detects a predetermined voltage within a range of said adjustable reference voltage and regulates a current value of said less significant analog current signal according to the detected voltage; and an adding device that adds said more significant analog signal and said less significant analog signal, thereby outputting an analog signal corresponding to said digital data.