Stabilization of single bit high order interpolative sigma delta modulators for analog-to-digital conversion in wireless mobile handset based electromyogram acquisition system

2016 ◽  
Author(s):  
Yu-Fan Zeng ◽  
Wing-Kuen Ling ◽  
Yuping Gui ◽  
Zhijing Yang ◽  
Qingyun Dai
Keyword(s):  
High Order ◽  
Acquisition System ◽  
Digital Conversion ◽  
Sigma Delta ◽  
Analog To Digital ◽  
Sigma Delta Modulators ◽  
Analog To Digital Conversion ◽  
Mobile Handset ◽  
Wireless Mobile

A RE-CONFIGURABLE ARCHITECTURE FOR SWITCHED CAPACITOR SIGMA-DELTA ANALOG-TO-DIGITAL CONVERSION

2013 ◽  
Vol 22 (09) ◽  
pp. 1340012
Author(s):  
KAREN WAN ◽  
GIGI CHAN ◽  
WILLIAM WONG ◽  
KAM CHUEN WAN ◽  
BRYCE YAU ◽  
...  
Keyword(s):  
Fourth Order ◽  
Cmos Technology ◽  
Second Order ◽  
Switched Capacitor ◽  
Noise Shaping ◽  
Digital Conversion ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
Analog To Digital ◽  
Analog To Digital Conversion

A re-configurable switched capacitor sigma-delta analog-to-digital conversion architecture1,2 is proposed. The architecture consists of a MASH sigma delta modulator with nth lower-order (first- or second-order) loops cascaded together. Each loop can be powered on or off operating in high or low performance mode, according to application needs. The architecture can be configured to optimize performance and power consumption for specific resolution and applications. The architecture is proven by means of a prototype, implemented as a fourth-order and fabricated in a standard 0.18 um CMOS technology. The outputs of both high performance mode (fourth-order) and medium performance mode (second-order, first loop ON) are measured to demonstrate the configurability. The FFT demonstrates that the noise shaping for the fourth-order modulator is better than that of the second-order modulator with steeper noise shaping slope.

Bandpass sigma-delta analog-to-digital conversion

1991 ◽  
Vol 38 (11) ◽  
pp. 1406-1409 ◽  
Author(s):  
S. Jantzi ◽  
R. Schreier ◽  
M. Snelgrove
Keyword(s):  
Digital Conversion ◽  
Sigma Delta ◽  
Analog To Digital ◽  
Analog To Digital Conversion
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