Name
Title | ||
|---|---|---|
An all-digital analog-to-digital converter with 12-μV/LSB using moving-average filtering |
Abstract | ||
|---|---|---|
A compact, high-resolution analog-to-digital converter (ADC) especially for sensors is presented. The basic structure is a completely digital circuit including a ring-delay-line with delay units (DUs), along with a frequency counter, latch and encoder. The operating principles are: 1) the delay time of the DU is modulated by the analog-to-digital (A/D) conversion voltage and 2) the delay pulse passes through a number of DUs within a sampling (= integration) time and the number of DUs through which the delay pulse passes is output as conversion data. Compact size and high resolution were realized with an ADC having a circuit area of 0.4 mm(2) (0.8-mum CMOS) and a resolution of 12 muV (10 kS/s). Its nonlinearity is +/-0.1% FS per 200-mV span (1.8-2.0 V), for 14-b resolution. Sample holds are unnecessary and a low-pass filter function removes high-frequency noise simultaneously with A/D conversion. Thus, the combination of this ADC and a digital filer that follows can eliminate an analog prefiler to prevent the aliasing before A/D conversion. Also, both this ADC can be shrunk and operated at low voltages, so it is an ideal means to lower the cost and power consumption. Drift errors can be easily compensated for by digital processing. |
Year | DOI | Venue |
|---|---|---|
2003 | 10.1109/JSSC.2002.806263 | Solid-State Circuits, IEEE Journal of |
Keywords | DocType | Volume |
CMOS digital integrated circuits,analogue-digital conversion,digital filters,error compensation,low-power electronics,sensors,0.8 micron,12 muV,14 bit,CMOS IC,all-digital ADC,analog-to-digital converter,compact high-resolution ADC,delay units,digital A/D converter,digital IC,digital filter,drift error compensation,encoder,frequency counter,latch,low voltage operation,low-pass filter function,moving-average filtering,ring-delay-line,sensor interface,sensors | Journal | 38 |
Issue | ISSN | Citations |
1 | 0018-9200 | 5 |
PageRank | References | Authors |
0.96 | 0 | 3 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| T. Watanabe | 1 | 252 | 51.28 |
| Mizuno, T. | 2 | 35 | 11.82 |
| Makino, Y. | 3 | 5 | 1.29 |