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
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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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