A 83-dB SFDR 10-MHz Bandwidth Continuous-Time Delta-Sigma Modulator Employing a One-Element-Shifting Dynamic Element Matching

2012 ◽  
Vol E95.C (6) ◽  
pp. 1017-1025
Author(s):  
Hong Phuc NINH ◽  
Masaya MIYAHARA ◽  
Akira MATSUZAWA
Keyword(s):  
Continuous Time ◽  
Dynamic Element Matching ◽  
Delta Sigma Modulator ◽  
Delta Sigma ◽  
Dynamic Element

A Wideband Continuous Time Quadrature Delta Sigma Modulator Based on a Real DSM for Low Power WLAN Receiver

2017 ◽  
Vol 27 (03) ◽  
pp. 1850044 ◽  
Author(s):  
Alireza Shamsi ◽  
Esmaeil Najafi Aghdam
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Continuous Time ◽  
Signal To Noise Ratio ◽  
System Level ◽  
Complex Coefficient ◽  
Loop Filter ◽  
Delta Sigma Modulator ◽  
Delta Sigma ◽  
Excess Loop Delay

Power consumption and bandwidth are two of the most important parameters in design of low power wideband modulators as power consumption is growing with the increase in bandwidth. In this study, a multi bit wideband low-power continuous time feed forward quadrature delta sigma modulator (CT-FF-QDSM) is designed for WLAN receiver applications by eliminating adders from modulator structure. In this method, a real modulator is designed and its excess loop delay (ELD) is compensated, then, it is converted into a quadrature structure by applying the complex coefficient to loop filter. Complex coefficients are extracted by the aid of a genetic algorithm to further improve signal to noise ratio (SNR) for bandwidth. One of the disadvantages of CT-FF-QDSM is the adders of loop filters which are power hungry and reduce the effective loop gain. Therefore, the adders have been eliminated while the transfer function is intact in the final modulator. The system level SNR of the proposed modulator is 62.53[Formula: see text]dB using OSR of 12. The circuit is implemented in CMOSTSMC180nm technology. The circuit levels SNR and power consumption are 54[Formula: see text]dB and 13.5[Formula: see text]mW, respectively. Figure of Merit (FOM) obtained from the proposed modulator is about 0.824 (pj/conv) which is improved (by more than 40%) compared to the previous designs.

A Fully Integrated Current-Mode Continuous-Time Delta-Sigma Modulator For Biological Nanopore Read-Out

2018 ◽  
pp. 1-1
Author(s):  
Mohammad Abdeljaleel Amayreh ◽  
Gerhard Baaken ◽  
Jan C. Behrends ◽  
Yiannos Manoli
Keyword(s):  
Continuous Time ◽  
Current Mode ◽  
Fully Integrated ◽  
Delta Sigma Modulator ◽  
Delta Sigma
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