Active rc filters using an operational transconductance amplifier and an operational amplifier

In this paper, practical circuits for operational transresistance amplifier (OTRA) realizable in lab using commercial ICs have been designed and proposed. 3 structures based on operational amplifier (OPAMP-LM741), operational transconductance amplifier (OTA-CA3080) and current conveyors II (AD844) have been proposed. In these proposed designs, conditions to mimic the current-voltage behavior of OTRA have been formulated using active and passive components. Moreover, these components are also used to achieve flexibility in transresistance gain of implemented OTRA. The behavior of the proposed OTRA structures have been validated using LTSPICE. Furthermore, to represent practical usability of these designs oscillator circuit have been designed and implemented on software and experimentally also on bread board. All the results prove the OTRA operation of the designed circuits and their usability in the practical environment.

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Synthesis of a Novel Low-Component Programmable Sinusoidal Oscillator

Active and Passive Electronic Components ◽

10.1155/apec.26.31 ◽

2003 ◽

Vol 26 (1) ◽

pp. 31-36 ◽

Cited By ~ 4

Author(s):

Muhammad Taher Abuelma'atti ◽

Sa'ad Muhammad Al-Shahrani

Keyword(s):

Excellent Agreement ◽

Operational Amplifier ◽

Operational Transconductance Amplifier ◽

Current Feedback ◽

Transconductance Amplifier ◽

Sinusoidal Oscillator ◽

Current Feedback Operational Amplifier ◽

Synthesis Approach

A novel circuit is presented for realizing a sinusoidal oscillator. The proposed circuit, developed through a true synthesis approach, uses one current-feedback operational amplifier (CFOA), one operational transconductance amplifier (OTA), three grounded capacitors and one floating resistor. The proposed circuit enjoys several attractive features. Practical results, in excellent agreement with the presented theory, are included.

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ON THE TRANSFORMATION OF GROUNDED INDUCTORS TO FLOATING INDUCTORS USING OFA AND FCCII

Journal of Circuits System and Computers ◽

10.1142/s0218126611007232 ◽

2011 ◽

Vol 20 (02) ◽

pp. 243-262 ◽

Cited By ~ 4

Author(s):

AHMED M. SOLIMAN

Keyword(s):

Operational Amplifier ◽

Current Conveyor ◽

Operational Transconductance Amplifier ◽

Transconductance Amplifier ◽

Simulation Results

It is well known that a floating inductor circuit is realized from a grounded inductor circuit by replacing the operational amplifier by a floating operational transconductance amplifier. This idea is extended to transform current conveyor grounded inductors to floating inductors by replacing the current conveyor by the recently introduced floating current conveyor. Several examples are considered and simulation results are given to support the theory. Although the paper is partially a review in nature it includes several new realizations of floating inductors.

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A NOTE ON THE TRANSFORMATION OF GROUNDED INDUCTORS TO FLOATING INDUCTORS USING OFA AND FCCII

Journal of Circuits System and Computers ◽

10.1142/s0218126612500867 ◽

2013 ◽

Vol 22 (02) ◽

pp. 1250086

Author(s):

AHMED M. SOLIMAN

Keyword(s):

Operational Amplifier ◽

Review Paper ◽

Current Conveyor ◽

Operational Transconductance Amplifier ◽

Transconductance Amplifier

Recently this author published a paper1 discussing the transformation of grounded inductors to floating inductors using operational floating amplifier (OFA) or floating current conveyor (FCCII). The author classified the paper as a partially review paper as stated in the abstract and in the introduction of Ref. 1 The author states in the abstract that: It is well known that a floating inductor circuit is realized from a grounded inductor circuit by replacing the operational amplifier by a floating operational transconductance amplifier. This idea is extended to transform current conveyor grounded inductors to floating inductors by replacing the current conveyor by the recently introduced floating current conveyor.

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