Design and evaluation of a high-precision, fully tunable OTA-C bandpass filter implemented in GaAs MESFET technology

Visocchi, P.; Taylor, J.; Mason, R.; Betts, A.K.; Haigh, D.G.

doi:10.1109/4.303724

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…However, the limitations on bandwidth and slew rate of operational amplifiers lead the analog designer to search for other possibilities. Recently, operational g m amplifier Impact on Gain and Noise : ECG Amplifier & Comb Filter Design using OTA Rohith Bala Jaswanth B, V. V. K. D. V. Prasad, M. Kamaraju (OTA) is considered as the most suitable constructional blocks in analog signal processing (ECG amplifiers) due to its higher bandwidth, slew rate, and transconductance gain [27]- [32]. In addition a current input is used to regulate the amplifier's g m .…”

Section: Introductionmentioning

confidence: 99%

Impact on Gain and Noise : ECG Amplifier & Comb Filter Design using OTA

B¹,

Prasad²,

Kamaraju³

2019

IJEAT

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The research paper ventures a novel modelling strategy of finite gain and noise of an electrocardiogram (ECG) amplifier at 0.18, 0.5 and 0.9 micron standard CMOS technologies respectively. An active comb filter is used to design the amplifier for removing the selected frequencies of numerous signals. The presented filter is configured with only Operational Transconductance Amplifiers (OTAs) and capacitors that makes it apt for implementation of monolithic integrated circuits (ICs). The relevance of this analog circuit is verified for a suitable test signal of 60 Hz as in the ECG signal. Using Cadence Virtuoso analog design environment, the effect of transistor channel length and width is examined for analysis of noise and bandwidth. It is observed that the performance in terms of noise and gain considerably increases for advanced technology node. However, for a suitable supply of bias current, a portable ECG system can also provide an improved bandwidth performance of advanced CMOS technology

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Section: Introductionmentioning

confidence: 99%

Impact on Gain and Noise : ECG Amplifier & Comb Filter Design using OTA

B¹,

Prasad²,

Kamaraju³

2019

IJEAT

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“…Operational amplifiers are the most popular building block for analog circuit design. However, op-amp has limitations in bandwidth and slew rate which lead the analog designer to search for other possibilities [5][6][7][10][11][12][13][14][15][16][17]. Recently operational transconductance amplifier (OTA) has been found to be one of the most significant building blocks in analog signal processing.…”

Section: Introductionmentioning

confidence: 99%

Active Comb Filter Using Operational Transconductance Amplifier

Ranjan

Yalla

Sorya

et al. 2014

Active and Passive Electronic Components

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A new approach for the design of an active comb filter is proposed to remove the selected frequencies of various signals. The proposed filter is based on only OTAs and capacitors, hence suitable for monolithic integrated circuit implementation. The workability of the circuit is tested using PSPICE for test signals of 60, 180, 300, and 420 Hz as in ECG signal. The results are given in the paper and found to agree well with theory.

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