A comparison design of comb decimators for sigma-delta analog-to-digital converters

被引:58
|
作者
Gao, YH [1 ]
Jia, LH [1 ]
Isoaho, J [1 ]
Tenhunen, H [1 ]
机构
[1] Royal Inst Technol, Elect Syst Design Lab, S-16440 Stockholm, Sweden
关键词
comb decimator; non-recursive algorithm; recursive algorithm; low power; high speed; sigma-delta A/D converters;
D O I
10.1023/A:1008372010560
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
This paper presents a comparison design of comb decimators based on the non-recursive algorithm and the recursive algorithm. Compared with the recursive algorithm, the main advantage of the non-recursive algorithm is its abilities of reducing power consumption and increasing circuit speed especially when the decimation ratio and filter order are high. Based on the non-recursive algorithm, a decimator with programmable filter orders (3rd, 4th and 5th), decimation ratios (8, 16, 32 and 64) and input bits (1 and 2 bits) has been implemented in a 0.6 mu m 3.3 V CMOS process. Its measured core power consumption is 44 mW at the oversampling rate of 25 MHz and its highest input data rate is 110 MHz.
引用
收藏
页码:51 / 60
页数:10
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