The Power-efficient biomedical acquisition system by variable-resolution sigma-delta modulator

2007 ◽  
Author(s):  
Chen-Ming Hsu ◽  
Wei-Song Wang ◽  
Ching Hsing Luo
Keyword(s):  
Acquisition System ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
Variable Resolution ◽  
Power Efficient

Single-loop sigma delta modulator design and verification for cognitive IoT applications

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Vamsee Krishna S. ◽  
Sudhakara Reddy P. ◽  
Chandra Mohan Reddy S.
Keyword(s):  
Discrete Time ◽  
Noise Shaping ◽  
Third Order ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
Content Type ◽  
Power Efficient ◽  
Single Loop ◽  
Physiological Signal ◽  
Iot Applications

Purpose A third-order discrete time sigma delta modulator (SDM) is proposed with optimum performance by addressing instability and power dissipations issues, and a novel SDM architecture is designed and verified in behavioural modelling in MATLAB/SIMULINK environment. Simulation results show that performance parameters of proposed modulator achieved SNR of 105.41 dB, SNDR of 101.96 dB and DR of 17 bits for the signal bandwidth of 20 kHz. Design/methodology/approach This paper describes single-loop SDM design with optimum selection of integrator weights for physiological signal processing in IoT applications. Findings The proposed discrete time modulator designed with 1-bit quantizer and optimum oversampling ratio proved as power efficient. Integrator scaling coefficients are generated in LabVIEW environment for pure third-order noise shaping. Originality/value This paper contains the novelty in the work, and it is suitable for cognitive Internet of Things applications.

Sensor Signal Digitization Utilizing a Band-Pass Sigma-Delta Modulator

2009 ◽  
Vol E92-C (6) ◽  
pp. 860-863 ◽  
Author(s):  
Lukas FUJCIK ◽  
Linus MICHAELI ◽  
Jiri HAZE ◽  
Radimir VRBA
Keyword(s):  
Sensor Signal ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
Band Pass
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