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  • Anindita Paul1,
  • Mario Renteria-Pinon2 and
  • Jaime Ramirez-Angulo3,*
  • et al.

Reviewer 1: Anonymous Reviewer 2: Anonymous

Round 1

Reviewer 1 Report

This paper presents a power-efficient class-AB amplifier. While the results seem interesting, the presentation needs to be improved significantly. Detailed comments are as follows.

  1. Abstract is not informative enough.
  2. Despite obvious, the references for the very first sentence in Section 1 needs to be provided.
  3. More fundamental circuit analyses on Figure 1 and 2 must be included.
  4. Table 1 compares many architectures, while most of them are not explained at all. The previous works should be described in more detail, and should be contrasted to the proposed one further. After that, Table 1 can be convincing.
  5. For FOMss, along with “a/b” form, it would be better to present the quotient q (= a/b) as well.
  6. It is a bit awkward that there are three FOMs. Is it possible to define a single universal one?

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

This paper presents an approach to design Miller Class AB OTAs with symmetrical and enhanced slew rate.
The main idea is to exploit an auxiliary amplifier to increase the voltage swing at the gate of the output NMOS. The implementation of the auxiliary amplifier allows to accurately set the output quiescent current through the ratio of Mon and M5 aspect ratios. This is a very interesting approach.
The proposed amplifier is analyzed both through analytical models and simulations.
The paper is very clear and easy to follow.
The robustness of the proposed amplifier to PVT variations and mismatches is not mentioned at all in the paper. Some considerations on these aspects would improve the manuscript. In particular  the effect of mismatches on the quiescent current should be discussed and compared to other approaches.
The percentage of self citations is quite high; authors are invited to revise the references in order to lower the percentage of self citations.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

The concerns of the reviewer have been addressed. Thank you.