Design of high CMRR two stage gate driven OTA using 0.18 µm CMOS Technology

Gaonkar, Siddesh; Sushma, P. S.; Fathima, Amra

doi:10.1109/iccci.2016.7480011

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…Common mode rejection ratio (CMRR) is the ratio of differential mode gain to common mode gain which is used to quantify the ability of OTA to reject common mode signals or noise. CMRR can be measured using (5).…”

Section: Ota Specifications For Bio-medical Applicationmentioning

confidence: 99%

“…By taking into account the differential mode gain and common gain from AC analysis, the CMRR for both OTAs were calculated using (5). The CMRR for 45 nm OTA was 93.2 dB and for 90 nm OTA was 102.6 dB.…”

Section: Common Mode Rejection Ratio (Cmrr)mentioning

confidence: 99%

“…There is a variation of Op-Amp called as operational transconductance amplifier (OTA). It is a type of amplifier that takes in differential input voltages and produced output current thus it is categorized as voltage controlled current source [5].…”

Section: Introductionmentioning

confidence: 99%

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Design and analysis of current mirror OTA in 45 nm and 90 nm CMOS technology for bio-medical application

Jusoh¹,

Ruslan²

2020

Bulletin EEI

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This paper proposed a design and performance analysis of current mirror operational transconductance amplifier (OTA) in 45 nm and 90 nm complementary metal oxide semiconductor (CMOS) technology for bio-medical application. Both OTAs were designed and simulated using Synopsys tools and the simulation results were analysed thoroughly. The OTAs were designed to be implemented in bio-potential signals detection system where the input signals were amplified and filtered according to the specifications. From the comparative analysis of both OTAs, the 45 nm OTA managed to produce open loop gain of 45 dB, with common mode rejection ratio (CMRR) of 93.2 dB. The 45 nm OTA produced only 1.113 μV√Hz of input referred noise at 1 Hz. The 45 nm OTA also consumed only 28.21 nW of power from ± 0.5 V supply. The low-power consumption aspect displayed by 45 nm OTA made it suitable to be implemented in bio-medical application such as bio-potential signals detection system where it can be used to amplify and filter the electrocardiogram (ECG) signals.

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Section: Ota Specifications For Bio-medical Applicationmentioning

confidence: 99%

Section: Common Mode Rejection Ratio (Cmrr)mentioning

confidence: 99%

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Design and analysis of current mirror OTA in 45 nm and 90 nm CMOS technology for bio-medical application

Jusoh¹,

Ruslan²

2020

Bulletin EEI

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Design of ECG Front End Amplifier Based on CMOS OTA

Zhang

Meng

Fan

2021

J. Phys.: Conf. Ser.

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The low-noise and low-power amplifier, an important part of ECG recordings, remains a vital challenge in the biomedical instrumentation amplifier field. This paper describe a method of using the capacitive feedback structure and the MOS-bipolar pseudo-resistor to reject the DC offset and amplify signals down to the milli-hertz range. This study used the noise efficiency factor (NEF) to quantify the tradeoff between power and noise. Fabricated in a 180 nm CMOS process, the amplifier consumes 1.44 µW, and achieves the input referred noise of 3.89 µVrms The calculated NEF is 18.07, while the corresponding to common-mode rejection ratio (CMRR) is 87.72 dB. The device achieves low-noise, low-power and appropriate CMRR, which provides a reference for the design of biomedical instrumentation amplifier.

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A 180 nm Low-Cost Operational Amplifier for IoT Applications

Vicuna

Mosquera

Rendon

et al. 2021

2021 IEEE Fifth Ecuador Technical Chapters Meeting (ETCM)

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This paper presents the design and post-layout simulation of a two-stage operational amplifier (opamp) with Miller compensation. The TSMC 0.18µm PDK was used for the design, simulation and implementation in Cadence Virtuoso. The opamp exhibits 20µW power consumption with a 1-V rail-to-rail supply. Post layout simulation shows a unity gain bandwidth (UGBW) of 69.18 MHz (Av = 49.63dB) with a phase margin (PM) larger than 86°and a Slew rate of 19.87µV/s making our design suitable for small and large signal applications.

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Design of high CMRR two stage gate driven OTA using 0.18 µm CMOS Technology

Cited by 8 publications

References 7 publications

Design and analysis of current mirror OTA in 45 nm and 90 nm CMOS technology for bio-medical application

Design and analysis of current mirror OTA in 45 nm and 90 nm CMOS technology for bio-medical application

Design of ECG Front End Amplifier Based on CMOS OTA

A 180 nm Low-Cost Operational Amplifier for IoT Applications

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