Journal ArticleDOI
Active compensation of opamps
Ahmed M. Soliman,M. Ismail +1 more
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TLDR
In this paper, a universal active compensation scheme for the finite gain bandwidth of operational amplifiers, when used in voltage-controlled voltage source structures, is proposed, which can be used with operational amplifier voltage controlled voltage sources, when looked upon as a general threeport active building block.Abstract:
A novel active compensation method for the finite gain bandwidth of operational amplifiers, when used in voltage-controlled voltage source structures, is given. In this method, a universal active compensation scheme is proposed which can be used with operational amplifier voltage-controlled voltage sources, when looked upon as a general threeport active building block. It is shown that phase shifts contributed by imperfect operational amplifiers are virtually eliminated over an extended frequency range. Experimental resnits are presented.read more
Citations
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Journal ArticleDOI
Composite operational amplifiers: Generation and finite-gain applications
Wasfy B. Mikhael,S. Michael +1 more
TL;DR: In this paper, a general approach for extending the useful operating frequencies and improving the performance of linear active networks realized using operational amplifiers (OA's) is presented, where each OA in the active network is replaced by a composite operational amplifier (CNOA) constructed using N OA's.
Journal ArticleDOI
Linearization techniques for nth-order sensor models in MOS VLSI technology
N.I. Khachab,Mohammed Ismail +1 more
TL;DR: In this paper, the authors present new linearization techniques and introduce novel circuits for second-and third-order sensor models, which are based on subtle circuit design of simple and compact multiplier/divider and vector multiplier circuits that comprise op-amps and MOS transistors.
Proceedings ArticleDOI
Operational floating conveyor
A.J. Payne,C. Toumazou +1 more
TL;DR: In this paper, an operational floating conveyor (OFC) is proposed to increase device versatility and enable accurate closed loop current amplifier topologies to be realized, including an accurate closed-loop current conveyor.
Journal ArticleDOI
Capacitance measurement based on an operational amplifier circuit: error determination and reduction
TL;DR: In this article, an operational-amplifier-based sine-wave oscillator applied in capacitance measurement was simulated using the SPICE program to study the behavior of the circuit under nonideal conditions, and to estimate the errors introduced in the measured capacitance and the frequency of oscillation.
Journal ArticleDOI
Design of active filters independent of first-and second-order operational amplifier time constant effects
Randall L. Geiger,A. Budak +1 more
TL;DR: In this article, a method of designing active filters in which the transfer function is independent of both first and second-order operational amplifier time constant effects is presented, which can be used to design a filter with any realizable transfer function of any order.
References
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Journal ArticleDOI
Frequency limitations of active filters using operational amplifiers
A. Budak,D. Petrela +1 more
TL;DR: This paper characterizes the amplifier by a one-pole rolloff model and discusses the ensuing limitations on four widely used low-pass realizations.
Journal ArticleDOI
Active compensation for high-frequency effects in op-amp circuits with applications to active RC filters
P. Brackett,Adel S. Sedra +1 more
TL;DR: In this paper, the use of active compensation in precision electronic circuits employing modern IC op amps, whereby the op amps in a circuit provide "self-compensating" effects to mitigate their finite bandwidth limitations is discussed.
Journal ArticleDOI
Compensation of some operational-amplifier based RC-active networks
TL;DR: In this paper, means of compensating for the finite gain bandwidth of operational amplifiers, when used in voltage-controlled voltage source and inverting integrator blocks, are described and are shown to virtually eliminate excess phase shifts over a prescribed frequency range.
Journal ArticleDOI
Exact synthesis with real amplifiers
TL;DR: In this article, it was shown that the two-pole amplifier is sometimes not the better choice, even though it has more gain at the operating frequency, and that sensitivities are optimized by tradeoffs involving positive feedback.
Journal ArticleDOI
A compensation technique for a gyrator and its use in the design of a channel-bank filter
Andreas Antoniou,K. Naidu +1 more
TL;DR: In this paper, a model proposed for an operational amplifier gyrator circuit is used to develop a compensation technique whereby the useful bandwidth of the gyrators circuit can be increased.
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