Filters








5,364 Hits in 3.0 sec

A Review on Low Power Designs of Operational Transconductance Amplifier with Linearity Techniques

Vidhata Poddar, Prof. Zoonubiya Ali
2015 International Journal of Engineering Research and  
In this paper the relationship among power consumption and linearity performance of CMOS OTA for RF applications are studied, that are illustrated in different literatures.  ...  Keywords-CMOS, IC (Integrated circuit), low power, linearity, low voltage, OTA (operational transconductance amplifier), deep submicron, RF (radio frequency). I. 18. A NEDUNGADI AND T. R.  ...  Among these mentioned technique adaptive biasing can be used for both linearity and as a low power technique. i. DETAILS OF THE LINEARITY AND LOW POWER TECHNIQUE MENTIONED ABOVE: - A.  ... 
doi:10.17577/ijertv4is090552 fatcat:wkgmhtqtfvgvrcug3zzp6jacee

A pseudo-differential OTA with linearity improving by HD3 feedforward

Chao-Liang Chien, Chung-Chih Hung, Chia-Wei Chen
2009 2009 IEEE Asian Solid-State Circuits Conference  
This paper presents a fully balanced structure of a CMOS operational transconductance amplifier (OTA) with high linearity for frequency up to 50MHz.  ...  The proposed circuit is based on a conventional pseudo-differential structure with a third-order harmonic distortion (HD3) feedforward technique to cancel out the output 3rd harmonic component.  ...  In this paper, an HD3 feedforward technique is proposed for linearity improvement while a pseudo-differential (PD) topology is applied at the circuit level for low-voltage and high-frequency operations  ... 
doi:10.1109/asscc.2009.5357222 fatcat:tnfjqerhsveknpwhlkoacc53tu

Robust highly linear high-frequency CMOS OTA with IM3 below - 70 dB at 26 MHz

Wenchang Huang, E. Sanchez-Sinencio
2006 IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications  
An enhanced configuration for a linearized MOS operational transconductance amplifier (OTA) is proposed.  ...  The proposed fully differential OTA circuit is based on resistive source degeneration and an improved adaptive biasing technique.  ...  Then a conventional source degeneration linearization technique is used to further improve the linearity of the differential pair.  ... 
doi:10.1109/tcsi.2006.875187 fatcat:yfy56ihtyvd2jhod6twmzqsb5u

Third-Order Elliptic Lowpass Filter for Multi-Standard Baseband Chain Using Highly Linear Digitally Programmable OTA

Mohamed B. Elamien, Soliman A. Mahmoud
2018 IOP Conference Series: Materials Science and Engineering  
In this paper, a third-order elliptic lowpass filter is designed using highly linear digital programmable balanced OTA.  ...  The DPOTA employs three linearization techniques which are the source degeneration, double differential pair and the adaptive biasing.  ...  The adopted tuning technique preserve the overall linearity performance of the proposed OTA.  ... 
doi:10.1088/1757-899x/341/1/012005 fatcat:6xu7mogk6rdhno7ckys2kcqlsy

Pico-A∕V range CMOS transconductors using series-parallel current division

A. Arnaud, C. Galup-Montoro
2003 Electronics Letters  
A simple design procedure for very small transconductors with extended linear range, using series-parallel division of current, is presented.  ...  It is based on a previously reported one-equation allregion transistor model. Using this technique, a 33 pico-A=V transconductor equivalent to a 30 GO resistor is demonstrated.  ...  A. Arnaud (GME-IIE, Facultad de Ingeniería, Universidad de la República, Montevideo, Uruguay) E-mail: aarnaud@iie.edu.uy C.  ... 
doi:10.1049/el:20030840 fatcat:5l4r6ck72rcqdm5ggc5h6hiza4

OTA Linearity Enhancement Technique for High Frequency Applications With IM3 Below$-$65 dB

A. Lewinski, J. Silva-Martinez
2004 IEEE transactions on circuits and systems - 2, Analog and digital signal processing  
A technique to enhance the linearity of continuous-time operational transconductance amplifiers (OTA)-C filters working at high frequencies is proposed.  ...  Each OTA consumes 10.5 mW and the transconductance can be tuned from 70 to 160 A/V while the IM3 remains below 70 dB up to 50 MHz for a 1.3-V pp differential input.  ...  This problem causes intermodulation components at the output; this is the reason for the existence of a large number of reported techniques devoted to improve the linearity of OTAs.  ... 
doi:10.1109/tcsii.2004.834531 fatcat:jdtefbri65axvizwbwstwj5nsa

A highly linear gilbert cell OTA with multiple gated transistors for non-coherent UWB receivers

Mostafa Yargholi, Abdolreza Nabavi
2009 IEICE Electronics Express  
This paper presents a highly linear Gilbert cell OTA by cancelling the second order transconductance derivative (gm ) of nMOS transistors near threshold voltage using the technique of multiple gated transistors  ...  Simulation results and analytical relations for THD and IIP3 in OTA illustrate the tradeoffs between linearity, bandwidth, and power dissipation.  ...  Proposed OTA with multiple gated transistors A simple low-power solution for linearity enhancement, without using onchip inductors, is the technique of multiple gated transistors [5] .  ... 
doi:10.1587/elex.6.756 fatcat:vwgcjbxv7bh6ri62tebm43kvgu

Nanowatt, Sub-nS OTAs, With Sub-10-mV Input Offset, Using Series-Parallel Current Mirrors

A. Arnaud, R. Fiorelli, C. Galup-Montoro
2006 IEEE Journal of Solid-State Circuits  
SP mirrors will be applied to the design of OTAs ranging from 33 pS to a few nS, with up to 1 V linear range, consuming in the order of 100 nW, and with a reduced area.  ...  Several design concerns will be studied: linearity, offset, noise, and leakages, as well as layout techniques.  ...  In [12] , a tutorial focused on classic linearization techniques for OTAs is presented, while in [1] , an interesting comparative study of different linearized OTAs in the nanosiemens range was shown  ... 
doi:10.1109/jssc.2006.880606 fatcat:ewyqjlzbovgtxdzjjguwhabuqq

On the design of very small transconductance OTAs with reduced input offset

Alfredo Arnaud, Rafaella Fiorelli, Carlos Galup-Montoro
2005 Proceedings of the 18th annual symposium on Integrated circuits and system design - SBCCI '05  
SP current-division will be then employed to design OTAs ranging from a few pS to a few nS, with up to 1V linear range, consuming in the order of 100nW, and with a reduced area.  ...  One-by-one several design non-idealities will be revised: linearity, offset, noise, leakages; as well as layout techniques.  ...  For this reason, the presented OTAs include a PMOS differential pair, and NMOS SP current mirrors.  ... 
doi:10.1145/1081081.1081093 dblp:conf/sbcci/ArnaudFG05 fatcat:e7tqasf6mnfjvj5d7wt23fo7l4

On the Design of Very Small Transconductance OTAs with Reduced Input Offset

Alfredo Arnaud, Rafaella Fiorelli, Carlos Galup-Montoro
2005 2005 18th Symposium on Integrated Circuits and Systems Design  
SP current-division will be then employed to design OTAs ranging from a few pS to a few nS, with up to 1V linear range, consuming in the order of 100nW, and with a reduced area.  ...  One-by-one several design non-idealities will be revised: linearity, offset, noise, leakages; as well as layout techniques.  ...  For this reason, the presented OTAs include a PMOS differential pair, and NMOS SP current mirrors.  ... 
doi:10.1109/sbcci.2005.4286825 fatcat:fmahnmpqyvcjdeylgflkerro5i

Power Efficient Fully Differential Bulk Driven OTA for Portable Biomedical Application

2018 Electronics  
The input part of the OTA consists of a bulk driven source degenerated differential pair and cross coupled transistors to improve the linearity of OTA.  ...  This paper presents a power efficient, bulk driven, source degenerated fully differential operational transconductance amplifier (OTA), operating in the subthreshold region.  ...  linearization techniques were used.  ... 
doi:10.3390/electronics7030041 fatcat:hz3shqpwpfcnfoik2zd4efx6pi

CMOS transconductance amplifiers, architectures and active filters: a tutorial

E. Sánchez-Sinencio, J. Silva-Martínez
2000 IEE Proceedings - Circuits Devices and Systems  
An updated version of a 1985 tutorial paper on active filters using operational transconductance amplifiers (OTAs) is presented.  ...  OTA-C filter architectures, current-mode filters, and other potential applications of transconductance amplifiers are discussed.  ...  only a linear term.Fig. 6illustrates the conceptual ideas of this linearisation technique.  ... 
doi:10.1049/ip-cds:20000055 fatcat:fxwcphjmmraatihmag6aogx5ce

Are CMOS Operational Transconductance Amplifiers Old Fashioned? A Systematic Review

Rodrigo Aparecido da Silva Braga, Paulo Marcio Moreira e Silva, Dean Bicudo Karolak
2022 Journal of Integrated Circuits and Systems  
Over the years, a number of techniques and approaches to OTA design have been observed in the literature.  ...  In our investigation we initially found 128 manuscripts and 24 primary studies of OTA design. A set of 10 different techniques have been found.  ...  ACKNOWLEDGEMENTS The authors would like thank Eric Drumond Rocha for the valuable contributions to this paper.  ... 
doi:10.29292/jics.v17i1.574 fatcat:5ycq7gkannhj3iz24pnil4jsxu

Frequency-dependent harmonic-distortion analysis of a linearized cross-coupled CMOS OTA and its application to OTA-C filters

Jianlong Chen, E. Sanchez-Sinencio, J. Silva-Martinez
2006 IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications  
This OTA, which is suitable for high-frequency operation, uses three linearization techniques simultaneously: 1) attenuation through floating-gate MOS transistors; 2) source degeneration; and 3) polynomial  ...  In this paper, we present a frequency-dependent harmonic-distortion analytical method applied to a linear-enhanced OTA.  ...  Huang for suggesting the use of floating-gate transistors, X. Liu and S. Cheng for their technical discussions, and X. Fan, C. Xin, T. Li, and F. Bahmani for their help while testing the chip.  ... 
doi:10.1109/tcsi.2005.859575 fatcat:gcrjwvemzrej3kkwtjaduzhlsi

0.5-V High Linear and Wide Tunable OTA for Biomedical Applications

Fabian Khateb, Tomasz Kulej, Meysam Akbari, Montree Kumngern
2021 IEEE Access  
This paper presents a low-voltage nano-power multiple-input operational transconductance amplifier (MI-OTA) with high linearity performance and increased input voltage swing.  ...  The MI-OTA circuit is designed for 0.5V voltage supply and offers a 0.22% total harmonic distortion (THD) for 0.2V pp input signal with total power consumption of 13.4nW.  ...  All these techniques improve the linearity significantly but reduce the DC gain of the OTA.  ... 
doi:10.1109/access.2021.3098183 fatcat:qw5bvy2xdvdntog43xiioz7ovy
« Previous Showing results 1 — 15 out of 5,364 results