| 摘要 |
PURPOSE: A digital-analog converter for a multi-bit sigma-delta modulator is provided to enable the multi-bit sigma-delta modulator to process an output signal including a lot of bits and include resolution. CONSTITUTION: A digital-analog converter for a multi-bit sigma-delta modulator includes a positive polarity unit (110), a negative polarity unit (120), and a differential amplifier (130). The positive polarity unit outputs a positive polarity reference voltage according to the output signal of a digital filter. The negative polarity unit outputs a negative polarity reference voltage according to the output signal. The differential amplifier receives the positive polarity reference voltage and the negative polarity reference voltage and outputs a positive polarity voltage and a negative polarity voltage. |
