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1

VHDL-AMS Models for Current Conveyor Based Monolithic Operational Amplifiers

Pandiev Ivailo M.

International Journal of Microelectronics and Computer Science

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2018

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Vol. 9, nr 1

34--46

EN

This paper focuses on analysis and behavioral modeling of second generation positive and negative current conveyors (CCII+s, CCII‒s), as well current-controlled current conveyors (CCCIIs). On the basis of the proposed CCII+ model improved behavioral models for three-terminal and four-termi-nal monolithic CFOAs are created. The models are developed by using VHDL analog and mixed-signal (VHDL-AMS) language and the descriptions are adapted to the SystemVision (version 5.5) simulation program, which is a part of the Mentor Graphics system. The proposed models simulate static and dynamic para-meters for differential and common-mode input signals at room temperature, including the parameters input offsets, accurate input impedances, non-dominant poles at differential input signals, AC common-mode rejection, PSRR effects, output impe-dances, slew rate limiting and terminal voltage/current operating ranges. The modeling parameters are extracted for commercially available four-terminal CFOA AD844A and CCCII OPA860 by analyzing semiconductor data books or through characterization measurements. For the validation process simulation and experi-mental results for sample electronic circuits are given.

2

CMOS ECCCII with Linear Tune of Rx and Its Application to Current-Mode Multiplier

Sakul C.

International Journal of Electronics and Telecommunications

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2018

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Vol. 64, No. 3

385--390

EN

In this paper, the second-generation CMOS currentcontrolled-current-conveyor based on differential pair of operational transconductance amplifier has been researched and presented. Since the major improvement of its parasitic resistance at x-port can be linearly controlled by an input bias current, the proposed building block is then called “The Second-Generation Electronically-tunable Current-controlled Current Conveyor” (ECCCI). The applications are demonstrated in form of both 2 quadrant and 4 quadrant current-mode signal multiplier circuits. Characteristics of the proposed ECCCII and its application are simulated by the PSPICE program from which the results are proved to be in agreement with the theory.

3

Realization of Colpitts Oscillator using second generation current controlled current conveyor

Joshi Manoj, Bhatt Vivek, Ranjan Ashish, Benjwal Pramod

Annals of Computer Science and Information Systems

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2017

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Vol. 10

49--52

EN

An inductor-less tunable Colpitts oscillator using second generation current controlled current conveyor (CCCII) is implemented. The circuit uses a CCCII and three grounded capacitors. The passive inductor has been replaced by an active inductor [14] connected to the ground. Thus the absence of external resistor and an inductor in the circuit makes it more complacent for IC Design. The frequency of oscillation can easily be electronically adjusted. The PSPICE simulation results have been deduced. The theoretical results are verified with the parameters of BJT PR100N (PNP) and NR100N (NPN) using PSPICE simulation tool.