| 摘要 |
Method and device for converting analogue signals, of a plurality of pathways, into digital signals. A common circuit (2, 3) generates first analogue signals corresponding to high-order bits of digital signals For each pathway, a first means compares the first analogue signals with the signal to be converted. A first means (18) stores high-order bits corresponding to the value of a first analogue signal close to the signal to be converted. A means (9) stores the deviation between the analogue signal to be converted and said first detected value. A generator means (11, 12) generates a predetermined number of second analogue signals. A second means compares by successive approximations said second analogue signals with said deviation. A means (20) stores said low-order bits corresponding to the results arising from said second means of comparison. A means (22) assembles said high-order bits and said low-order bits. |
| 主权项 |
1. A method for converting analog signals, respectively present on a plurality of channels, into digital signals, comprising:
generation of a succession, common to all the channels, of predetermined first analog signals having predetermined values in a staircase with wide successive steps, each value of which corresponds to most-significant bits of digital signals, and, for each channel: comparison of the value of the analog signal to be converted successively with each of said predetermined values, detection of a predetermined first value of the first analog signal close to the value of the analog signal to be converted, storage of the values of the most-significant bits corresponding to said detected predetermined first value, storage of the residual or remainder resulting from the difference between the value of the analog signal to be converted and said detected predetermined value, comparison, by successive approximations, of said residual or remainder with predetermined second analog signals contained between two bounds of analog signals, the difference between which is greater than said step of said succession, successive storage of the states of the results of the comparison by successive approximations, corresponding to least-significant bits of digital signals, assembly of the most-significant bits and the least-significant bits, so as to deliver a digital signal corresponding to the value of the analog signal to be converted, this digital signal comprising the least-significant bits, with the exception of the highest, and the most-significant bits, to which the highest of the least-significant bits is added. |
