A Method to Improve CMRR for CMOS Operational Amplifier by Using Feedforward Technique
Summary :
In this paper, two types of improved CMRR CMOS OAs, N type and P type, without common-mode feedback and the cascode current mirrors, are proposed. The CMRR of proposed OAs are enhanced by compensating variations in tail bias current, caused by a common mode input signal, at the differential input stage, by means of feedforward controlled current source. Simulation results show that the CMRR of the proposed OAs are 20dB higher than that of conventional OAs.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E80-A No.2 pp.356-359
- Publication Date
- 1997/02/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section LETTER (Special Section on Analog Circuit Techniques for System-on-Chip Integration)
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Eitake IBARAGI, Akira HYOGO, Keitaro SEKINE, "A Method to Improve CMRR for CMOS Operational Amplifier by Using Feedforward Technique" in IEICE TRANSACTIONS on Fundamentals,
vol. E80-A, no. 2, pp. 356-359, February 1997, doi: .
Abstract: In this paper, two types of improved CMRR CMOS OAs, N type and P type, without common-mode feedback and the cascode current mirrors, are proposed. The CMRR of proposed OAs are enhanced by compensating variations in tail bias current, caused by a common mode input signal, at the differential input stage, by means of feedforward controlled current source. Simulation results show that the CMRR of the proposed OAs are 20dB higher than that of conventional OAs.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e80-a_2_356/_p
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@ARTICLE{e80-a_2_356,
author={Eitake IBARAGI, Akira HYOGO, Keitaro SEKINE, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Method to Improve CMRR for CMOS Operational Amplifier by Using Feedforward Technique},
year={1997},
volume={E80-A},
number={2},
pages={356-359},
abstract={In this paper, two types of improved CMRR CMOS OAs, N type and P type, without common-mode feedback and the cascode current mirrors, are proposed. The CMRR of proposed OAs are enhanced by compensating variations in tail bias current, caused by a common mode input signal, at the differential input stage, by means of feedforward controlled current source. Simulation results show that the CMRR of the proposed OAs are 20dB higher than that of conventional OAs.},
keywords={},
doi={},
ISSN={},
month={February},}
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TY - JOUR
TI - A Method to Improve CMRR for CMOS Operational Amplifier by Using Feedforward Technique
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 356
EP - 359
AU - Eitake IBARAGI
AU - Akira HYOGO
AU - Keitaro SEKINE
PY - 1997
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E80-A
IS - 2
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - February 1997
AB - In this paper, two types of improved CMRR CMOS OAs, N type and P type, without common-mode feedback and the cascode current mirrors, are proposed. The CMRR of proposed OAs are enhanced by compensating variations in tail bias current, caused by a common mode input signal, at the differential input stage, by means of feedforward controlled current source. Simulation results show that the CMRR of the proposed OAs are 20dB higher than that of conventional OAs.
ER -
English
