Current-Feedback Instrumentation Amplifier Using Dual-Chopper Fill-In Technique
Round 1
Reviewer 1 Report
This paper presents a dual-chopper glitch reduction current-feedback instrumentation amplifier (CFIA) with a ripple reduction loop. The CFIA is based on a low-noise chopper fully differential difference amplifier with a cascode stage, Monticelli class AB output stage, and is fabricated using a 0.18-µm CMOS standard process. The authors' aim and proposed technique are well described. The manuscript is of acceptable quality in the present form, but the following revisions are recommended:
1. The abbreviation for transimpedance amplifier is TIA. OTA stands for transconductance amplifier.
2. The article lacks a list of symbols and abbreviations. Please include all, including in the schematics used ones.
3. Missing junctions in Figure 7: Between MN2-MN4 and MN1(bottom line)-MN3.
4. The graphical presentation is at an above-average level. Delete the letter 'q' in Figure 9a, bottom-right corner.
5. Can the authors calculate the input-referred noise of the proposed circuit, including thermal and flicker noise components?
6. Please include simulation results for corners of the CMRR, PSPR, and Monte Carlo simulations.
7. Table 5 lacks information about CMRR, PSRR, chip area, and total power consumption.
8. Table 5 lacks a fair literature review, and the reference list is outdated. Please consider discussing and comparing the following CFIA realizations:
- https://doi.org/10.3390/app11177982
- https://doi.org/10.1109/ACCESS.2019.2892502
- https://doi.org/10.3390/app10010063
- https://doi.org/10.1109/ACCESS.2022.3144688
- https://doi.org/10.1109/ACCESS.2021.3103987
Comments for author File: 
Comments.pdf
Author Response
Hyoungho Ko, Ph. D.
Professor
Department of Electronics Engineering
Chungnam National University
99 Daehak-ro, Yuseung-gu, PHN: +82.42.821.5664
Daejeon 34134 FAX: +82.42.823.5436
Republic of Korea eMAIL: [email protected]
Manuscript ID: applsci-1940027
Oct 6, 2022
MDPI Applied Sciences
Dear Editor
Enclosed please find the revised version of the manuscript entitled, "Current-feedback Instrumentation Amplifier using Dual-chopper Fill-in Technique," being submitted for the MDPI Applied Sciences. I appreciate the valuable comments from the reviewers. I would also like to use the next page to answer the questions brought by the reviewers.
Thank you very much for your consideration.
Sincerely,
Hyoungho Ko
Ph.D.
enclosures
gc/HK
Author Response File: 
Author Response.docx
Reviewer 2 Report
The manuscript "Current-feedback Instrumentation Amplifier using Dual-chop- 2 per Fill-in Technique" was studied by Gyuri Choi et al. In my point of view, this manuscript needs more clarification and the work presents some problems and is not acceptable in the present form.
1. There are some grammatical mistakes/English mistakes that are needed to be corrected. A thorough check on the language is required.
2. Please explain more about the novelty and importance of this work in the introduction.
3. I recommend the authors to compare their results with the results of other research groups.
4. The authors should explain and discuss in more details about their results.
Author Response
Hyoungho Ko, Ph. D.
Professor
Department of Electronics Engineering
Chungnam National University
99 Daehak-ro, Yuseung-gu, PHN: +82.42.821.5664
Daejeon 34134 FAX: +82.42.823.5436
Republic of Korea eMAIL: [email protected]
Manuscript ID: applsci-1940027
Oct 6, 2022
MDPI Applied Sciences
Dear Editor
Enclosed please find the revised version of the manuscript entitled, "Current-feedback Instrumentation Amplifier using Dual-chopper Fill-in Technique," being submitted for the MDPI Applied Sciences. I appreciate the valuable comments from the reviewers. I would also like to use the next page to answer the questions brought by the reviewers.
Thank you very much for your consideration.
Sincerely,
Hyoungho Ko
Ph.D.
enclosures
gc/HK
Author Response File: Author Response.docx
Reviewer 3 Report
1- There are some typos in the text such as, last part of page 2 "low-frequency", last part of page 6 "Amplifier", page 7 "Figure 8"
2- Two important parameters of this kind of amplifier are input offset voltage and CMRR by considering the mismatch effects of different stages. Please add the simulation and measurement results related to these parameters.
3-please add Reference [4] to the comparison table.
Author Response
Hyoungho Ko, Ph. D.
Professor
Department of Electronics Engineering
Chungnam National University
99 Daehak-ro, Yuseung-gu, PHN: +82.42.821.5664
Daejeon 34134 FAX: +82.42.823.5436
Republic of Korea eMAIL: [email protected]
Manuscript ID: applsci-1940027
Oct 6, 2022
MDPI Applied Sciences
Dear Editor
Enclosed please find the revised version of the manuscript entitled, "Current-feedback Instrumentation Amplifier using Dual-chopper Fill-in Technique," being submitted for the MDPI Applied Sciences. I appreciate the valuable comments from the reviewers. I would also like to use the next page to answer the questions brought by the reviewers.
Thank you very much for your consideration.
Sincerely,
Hyoungho Ko
Ph.D.
enclosures
gc/HK
Author Response File: Author Response.docx
Round 2
Reviewer 2 Report
Accept after minor revision.
Author Response
As the reviewer commented, we corrected some grammatical errors and have also been corrected by the native speaker using the proof-reading service. Thank you for your comment.
Author Response File: Author Response.docx
Reviewer 3 Report
Simulation results for the mentioned parameters is not enough. Authors should add measurement results for CMRR and input offset voltage.
Author Response
As the reviewer commented, we added measurement results for CMRR and input offset voltage as shown in Figure 16(b) and Figure 18, respectively, on pages 11-12. Also, we modified the comparison table(Table 6) based on measurement results. Thank you for your comment.
Author Response File: Author Response.docx
