A 20 μW 95 dB dynamic range 4th-order Delta-Sigma modulator with novel power efficient operational transconductance amplifier and resonator

2011 ◽  
Vol 12 (6) ◽  
pp. 486-498 ◽  
Author(s):  
Jian Xu ◽  
Xiao-bo Wu ◽  
Meng-lian Zhao ◽  
Jun-yi Shen
Keyword(s):  
Dynamic Range ◽  
Operational Transconductance Amplifier ◽  
Power Efficient ◽  
Delta Sigma Modulator ◽  
Transconductance Amplifier ◽  
Delta Sigma

A 0.9-V 60-$\mu{\hbox {W}}$ 1-Bit Fourth-Order Delta-Sigma Modulator With 83-dB Dynamic Range

2008 ◽  
Vol 43 (2) ◽  
pp. 361-370 ◽  
Author(s):  
Jeongjin Roh ◽  
Sanho Byun ◽  
Youngkil Choi ◽  
Hyungdong Roh ◽  
Yi-Gyeong Kim ◽  
...  
Keyword(s):  
Fourth Order ◽  
Dynamic Range ◽  
Delta Sigma Modulator ◽  
Delta Sigma

scholarly journals A 103 dB DR Fourth-Order Delta-Sigma Modulator for Sensor Applications

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1093 ◽  
Author(s):  
Lee ◽  
Song ◽  
Roh
Keyword(s):  
High Resolution ◽  
Fourth Order ◽  
Power Efficiency ◽  
Dynamic Range ◽  
Oxide Semiconductor ◽  
Total Power ◽  
Signal To Noise ◽  
Chopper Stabilization ◽  
Delta Sigma Modulator ◽  
Delta Sigma

This paper describes a fourth-order cascade-of-integrators with feedforward (CIFF) single-bit discrete-time (DT) switched-capacitor (SC) delta-sigma modulator (DSM) for high-resolution applications. This DSM is suitable for high-resolution applications at low frequency using a high-order modulator structure. The proposed operational transconductance amplifier (OTA), used a feedforward amplifier scheme that provided a high-power efficiency, a wider bandwidth, and a higher DC gain compared to recent designs. A chopper-stabilization technique was applied to the first integrator to remove the 1/f noise from the transistor, which is inversely proportional to the frequency. The designed DSM was implemented using 0.35 µm complementary metal oxide semiconductor (CMOS) technology. The oversampling ratio (OSR) was 128, and the sampling frequency was 128 kHz. At a 500 Hz bandwidth, the signal-to-noise ratio (SNR) was 100.3 dB, the signal-to-noise distortion ratio (SNDR) was 98.5 dB, and the dynamic range (DR) was 103 dB. The measured total power dissipation was 99 µW from a 3.3 V supply voltage.

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