| 摘要 |
An analogue to digital converter comprises a first A/D converter 11 which converts an analog input voltage to a digital signal of m-bits, the digital signal is code-converted by a multiplier 17 to a digital signal, this code-converted digital signal is converted by a digital to analog converter 12 to an analog voltage, the difference between the last analog voltage and the above analog input voltage is converted by a second analog to digital converter (14) to a digital signal of n-bits, and this digital signal of n-bits and the above code-converted digital are added to each other to provide a digital signal af (m + n) bits which corresponds to the analog input voltage. |
