Low-Noise Chopper-Stabilized Multi-Path Operational Amplifier with Nested Miller Compensation for High-Precision Sensors
Abstract
:1. Introduction
2. Circuit Implementation of the Proposed Operational Amplifier
2.1. Architecture of the Proposed Multi-Path Operational Amplifier
2.2. Low-Frequency Path Design
2.3. Ripple Reduction Loop Design
2.4. High-Frequency Path Design
2.5. Frequency Response
2.6. Residual Input Offset
3. Measurement Results
3.1. Chip Die and Measurement Environment
3.2. Measurement Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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This Work | [5] | [10] | [16] | [17] | [18] | [19] | [20] | [21] | |
---|---|---|---|---|---|---|---|---|---|
Technology (µm) | 0.18 | 0.18–0.5 | 0.7 | 0.7 | 0.3–0.6 | 0.35 | 0.18 | 0.18 | 0.32 |
Multi-path | Y | N | N | Y | N | Y | N | N | N |
Power (µW) | 174 | 25.9 | 1150 | 715 | 27 | 3675 | 74 | 3.24 | 561 |
DC gain | >137 | 168 | - | 100 | >130 | 150 | 100 | - | 201.2 |
UGBW * | 3.16M | 260k | 800k | 1.8M | 350k | 4M | 2k | - | 40k |
CMRR (dB) | >125 | 124 | >120 | 137 | - | - | >120 | 100 | >120 |
PSRR (dB) | >100 | 120 | >120 | 120 | - | - | - | >70 | 115 |
Input referred offset (µV) | 1.99 | 2 | 5 | 1 | 3 | 0.78 | 1.78 | - | 2 |
Input referred noise (nV/√Hz) | 11.8 | 37 | 15 | 10.5 | 55 | 5.9 | 1.8 | 45.9 | 18 |
Chip Area (mm2) | 1.18 | 1.14 | 4.8 | 1.8 | 0.7 | 1.26 | 0.12 | 0.2 | 0.57 |
NEF ** | 4.4 | 5.5 | 8.8 | 4.8 | 8.1 | 8.4 | 17 | 2.37 | 10.6 |
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Kim, J.; Kim, H.; Han, K.; You, D.; Heo, H.; Kwon, Y.; Cho, D.-i.“.; Ko, H. Low-Noise Chopper-Stabilized Multi-Path Operational Amplifier with Nested Miller Compensation for High-Precision Sensors. Appl. Sci. 2020, 10, 281. https://doi.org/10.3390/app10010281
Kim J, Kim H, Han K, You D, Heo H, Kwon Y, Cho D-i“, Ko H. Low-Noise Chopper-Stabilized Multi-Path Operational Amplifier with Nested Miller Compensation for High-Precision Sensors. Applied Sciences. 2020; 10(1):281. https://doi.org/10.3390/app10010281
Chicago/Turabian StyleKim, Jaesung, Hyungseup Kim, Kwonsang Han, Donggeun You, Hyunwoo Heo, Yongsu Kwon, Dong-il “Dan” Cho, and Hyoungho Ko. 2020. "Low-Noise Chopper-Stabilized Multi-Path Operational Amplifier with Nested Miller Compensation for High-Precision Sensors" Applied Sciences 10, no. 1: 281. https://doi.org/10.3390/app10010281