A New Rail-to-Rail Second Generation Voltage Conveyor

In this paper, a novel low voltage low power CMOS second generation voltage conveyor (VCII) with an improved voltage range at both the X and Z terminals is presented. The proposed VCII is formed by a current buffer based on a class AB regulated common-gate stage and a modified rail-to-rail voltage buffer. Spice simulation results using LFoundry 0.15 μm low-Vth CMOS technology with a ±0.9 V supply voltage are provided to demonstrate the validity of the designed circuit. Thanks to the class AB behavior, from a bias current of 10 µA, the proposed VCII is capable of driving 0.5 mA on the X terminal, with a total power consumption of 120 µW. The allowed voltage swing on the Z terminal is at least equal to ±0.83 V, while on the X terminals it is ±0.72 V. Both DC and AC voltage and current gains are provided, and time domain simulations, where the voltage conveyor is used as a transimpedance amplifier (TIA), are also presented. A final table that summarizes the main features of the circuit, comparing them with the literature, is also given.

[1]  J. A. Svoboda,et al.  Current conveyors, operational amplifiers and nullors , 1989 .

[2]  Gaetano Palumbo,et al.  A high‐performance CMOS CCII , 2001, Int. J. Circuit Theory Appl..

[3]  J. Nunez,et al.  CCII+ Based on QFGMOS for Implementing Chua s Chaotic Oscillator , 2015, IEEE Latin America Transactions.

[4]  P.V.A. Mohan,et al.  Comments on "A transformation to obtain CCII-based adjoint of op-amp based circuits" [with reply] , 2000 .

[5]  Vincenzo Stornelli,et al.  High performance voltage output filter realizations using second generation voltage conveyor , 2018, International Journal of RF and Microwave Computer-Aided Engineering.

[6]  Kenneth C. Smith,et al.  The current conveyor—A new circuit building block , 1968 .

[7]  G. Ferri,et al.  An Overview on the Second Generation Voltage Conveyor: Features, Design and Applications , 2019, IEEE Transactions on Circuits and Systems II: Express Briefs.

[8]  Kamil Vrba,et al.  The Voltage Conveyor May Have in Fact Found its Way into Circuit Theory , 2004 .

[9]  M. Ismail,et al.  Rail-to-rail input stages: A voltage-mode design technique and a figure-of-merit , 2010, Proceedings of the 8th IEEE International NEWCAS Conference 2010.

[10]  Priyanka Sheokand,et al.  A New Low Voltage and Low Power Filter Using DTMOS-CCII , 2015, 2015 Second International Conference on Advances in Computing and Communication Engineering.

[11]  A. Fabre,et al.  A precise macromodel for second generation current conveyors , 1997 .

[12]  V. Kasemsuwan,et al.  A Simple Rail-to-Rail CMOS Voltage Follower , 2006, TENCON 2006 - 2006 IEEE Region 10 Conference.

[13]  Leonardo Pantoli,et al.  A Low Cost Flexible Power Line Communication System , 2016, Sensors.

[14]  Leonardo Pantoli,et al.  A rail-to-rail constant-g m CCII for Instrumentation Amplifier applications , 2018, AEU - International Journal of Electronics and Communications.

[15]  Kamil Vrba,et al.  KHN-equivalent voltage-mode filters using universal voltage conveyors , 2011 .

[16]  Leonardo Pantoli,et al.  A Novel Electronic Interface for Micromachined Si-Based Photomultipliers , 2018, Micromachines.

[17]  Leonardo Pantoli,et al.  Automatic Bridge-based Interface for Differential Capacitive Full Sensing☆ , 2016 .

[18]  Leonardo Pantoli,et al.  Reliable and Inexpensive Solar Irradiance Measurement System Design , 2016 .

[19]  Youngcheol Chae,et al.  A 1.8-V 6.9-mW 120-fps 50-Channel Capacitive Touch Readout With Current Conveyor AFE and Current-Driven $\Delta \Sigma $ ADC , 2018, IEEE Journal of Solid-State Circuits.

[20]  Igor M. Filanovsky Current conveyor, voltage conveyor, gyrator , 2001, Proceedings of the 44th IEEE 2001 Midwest Symposium on Circuits and Systems. MWSCAS 2001 (Cat. No.01CH37257).

[21]  Santiago Celma,et al.  A transformation method for equivalent infinite-gain op amp to unity-gain CCII networks , 1996 .

[22]  Vincenzo Stornelli,et al.  A New High Drive Class-AB FVF-Based Second Generation Voltage Conveyor , 2020, IEEE Transactions on Circuits and Systems II: Express Briefs.