Active filter design using operational transconductance amplifiers: A tutorial
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TLDR
In this paper, the operational transconductance amplifier (OTA) is used in voltage-controlled amplifiers, filters, and impedances for continuous-time monolithic filters, where the total number of components used in these circuits is small, and the design equations and voltage-control characteristics are attractive.Abstract:
Basic properties of the operational transconductance amplifier (OTA) are discussed. Applications of the OTA in voltage-controlled amplifiers, filters, and impedances are presented. A versatile family of voltage-controlled filter sections suitable for systematic design requirements is described. The total number of components used in these circuits is small, and the design equations and voltage-control characteristics are attractive. Limitations as well as practical considerations of OTA-based filters using commercially available bipolar OTAs are discussed. Applications of OTAs in continuous-time monolithic filters are considered.read more
Citations
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Proceedings ArticleDOI
Novel high-frequency continuous-time low-pass OTA based filters
B.M. Al-Hashimi,J.K. Fidler +1 more
TL;DR: A novel second-order low-pass operational transconductance amplifier (OTA)-based filter is described, which exhibits the following attractive features: use of grounded and equal valued capacitors throughout, low sensitivity to passive component tolerances, and good high-frequency operation.
Proceedings ArticleDOI
Controlled Gain Current and Differential Voltage Amplifier and study of its application in simple adjustable oscillator
TL;DR: Novel active element Controlled Gain Current and Differential Voltage Amplifier (CG-CDVA) and its implementation in a very simple adjustable oscillator is proposed and measurement setup is established that is suitable for preliminary experimental purposes.
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Integrated Bipolar Circuit for the Readout of a Capacitive Torque Sensor
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Proceedings ArticleDOI
A wideband current-mode amplifier implemented from OTAs and its applications
A. Fabre,N. Mimeche +1 more
TL;DR: A new concept for a current-mode amplifier having input and output signals which are currents is introduced, and SPICE simulation results using the nominal transistors parameters of the high performance bipolar array ALA200 from ATT are given and discussed.
References
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Journal ArticleDOI
High-frequency CMOS continuous-time filters
H. Khorramabadi,Paul R. Gray +1 more
TL;DR: Fully integrated, high-frequency continuous-time filters can be realized in MOS technology using a frequency-locking approach to stabilize the time constants using a phase-locked loop.
Journal ArticleDOI
Design of linear CMOS transconductance elements
A. Nedungadi,T. Viswanathan +1 more
TL;DR: In this paper, some novel circuit techniques for realizing linear CMOS tranconductance elements are proposed, which have superior linearity and input voltage range compared with the conventional source-coupled differential pair.
Journal ArticleDOI
Adaptive biasing CMOS amplifiers
TL;DR: In this paper, two transconductance amplifiers are presented in which the concept of an input dependent bias current has been introduced, and the amplifiers combine a very low standby power dissipation with a high driving capability.
Fully Integrated Analog Filters Using Bipolar-JFET Technology
R. D. Baertsch,W. E. Engeler,H.S. Goldberg,C.M. Puckette,Jerome Johnson Tiemann,David J. Allstot,Robert W. Brodersen,Paul R. Gray +7 more
TL;DR: In this paper, a new approach for realizing high-order analog filters which can be fully integrated using a compatible bipolar and ion-implanted JFET process is described, which is based on the recognition that what is really needed is a long time constant monolithic integrator.
Journal ArticleDOI
Gyrator video filter IC with automatic tuning
TL;DR: In this article, a single-chip gyrator filter for separating the components of the video signal in a TV receiver is described which is suitable for mass production in a standard bipolar process (f/SUB T//spl ap/400 MHz).
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