A novel fully differential telescopic operational transconductance amplifier

Li, Tianwang; Ye, Bo; Jiang, Jinguang

doi:10.1088/1674-4926/30/8/085002

Cited by 13 publications

(10 citation statements)

References 4 publications

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“…Although folded cascode (FC) architecture is commonly adopted for building SC circuits; telescopic architecture is chosen for OTA design in this case. Some related work supporting this idea is published in [6], [7]. It is well known that FC provides wider input common-mode range, better input-output common mode relation and high input/output swing [8].…”

Section: Ota Architecturementioning

confidence: 99%

Operational Transconductance Amplifier in 350nm CMOS technology

Mirković¹

2015

ELS

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This paper presents transistor level design of operational transconductance amplifier in CMOS technology. Custom designed, circuit is to be built-in into the mixed-signal, switched capacitor circuit. Amplifier targets relatively high slewrate and moderate open loop gain with megahertz order gainbandwidth. Adopted architecture is discussed appreciating application in switched capacitor circuits. Circuit behavior is examined through set of simulations. Obtained results confirmed desired behavior. Target technology process is TSMC 350nm.

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Section: Ota Architecturementioning

confidence: 99%

Operational Transconductance Amplifier in 350nm CMOS technology

Mirković¹

2015

ELS

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“…Hence, it widens its application area compared to conventional OP-AMP devices [7][8][9]. Even so, in submicron technology nodes, an OTA suffers from speed and gain degradation [10][11][12]. The gain degradation issue in nano-scale regime will be a notable snag in realizing highly dense integrated circuits [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Design of Folded Cascode Operational Transconductance Amplifiers (FC-OTA) based on Carbon Allotropes and their Comparative Analysis

Islam

Nizamuddin

2022

Preprint

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In this work, a folded cascode operational transconductance amplifier using CNTFET and GNRFET has been designed and simulated using HSPICE software. The structures of FC-OTA are formed using pure CNTFET and its hybrids which involve combination of CNTFET and CMOS both and lastly a structure has been formed using GNRFET. The detailed study reveals that compared to conventional CMOS-based FC-OTA, the performance of CNTFET- based FC-OTAs shows a lot of improvement. An appreciable increase in dc gain, output resistance and CMRR is observed in CNT based FC-OTA as compared to conventional CMOS-based FC-OTA. The phase margin (PM) and gain margin (GM) obtained in CNT- based FC-OTAs shows that they are quite stable. In addition, GNRFET-FC-OTA was also simulated and compared with CNTFET-FC-OTA. On comparison, it showed that CNT-based device showed significant increase in dc gain compared to GNRFET-FC-OTA. The performance of proposed FC-OTAs was further studied by changing CNT diameter, CNT pitch and no of CNTs and it was observed that by using optimized values for these parameters, the performance of proposed FC-OTA can be improved significantly. To sum up, it was observed that folded cascoded technique has significantly increased the gain in CNTFET-based FC-OTAs.

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“…Cascode OTA is a new class of OTA. It has improved gain (due to Band output resistance) and bandwidth due to reduced Miller capacitance [1][2][3][4][5]. In order to ensure further improvement in Cascode COTA performance, we have proposed Carbon Nanotube Field Effect Transistors (CNTFETs) based Circuits that promise to deliver much better performance than existing CMOS based Cascode Operational transconductance amplifiers [6].…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Analysis of Low Power Band Stop Filter

Khwaja¹

2019

IJARET

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In this paper, design and simulation of High performance Band-stop filter based on CNTFET-COTA using 45 nm technology node is proposed. The Cascade Operational Trans conductance amplifier (COTA) is an amplifier whose differential input voltage produces an output current. It is a voltage controlled current source (VCCS). Further, CNT technology is used to design and simulate proposed structure at 45 nm technology node. The proposed structure uses carbon nanotube field effect transistor. In a CNTFET, the channel is made up of parallel combination of SWCNTs. It is observed that the proposed BSF is also consuming low power of 42 µW.

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A novel fully differential telescopic operational transconductance amplifier

Cited by 13 publications

References 4 publications

Operational Transconductance Amplifier in 350nm CMOS technology

Operational Transconductance Amplifier in 350nm CMOS technology

Design of Folded Cascode Operational Transconductance Amplifiers (FC-OTA) based on Carbon Allotropes and their Comparative Analysis

Design and Performance Analysis of Low Power Band Stop Filter

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