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Operational amplifier applications

About: Operational amplifier applications is a(n) research topic. Over the lifetime, 3331 publication(s) have been published within this topic receiving 31172 citation(s). more


Open accessBook
Sergio Franco1Institutions (1)
01 Jan 1988-
Abstract: Franco's "Design with Operational Amplifiers and Analog Integrated Circuits, 3e" is intended for a design-oriented course in applications with operational amplifiers and analog ICs. It also serves as a comprehensive reference for practicing engineers. This new edition includes enhanced pedagogy (additional problems, more in-depth coverage of negative feedback, more effective layout), updated technology (current-feedback and folded-cascode amplifiers, and low-voltage amplifiers), and increased topical coverage (current-feedback amplifiers, switching regulators and phase-locked loops). Table of contents 1 Operational Amplifier Fundamentals 2 Circuits with Resistive Feedback 3 Active Filters: Part I 4 Active Filters: Part II 5 Static Op Amp Limitations 6 Dynamic Op Amp Limitations 7 Noise 8 Stability 9 Nonlinear Circuits 10 Signal Generators 11 Voltage References and Regulators 12 D-A and A-D Converters 13 Nonlinear Amplifiers and Phase-Locked Loops more

Topics: Transistor array (65%), Operational amplifier applications (65%), Analog multiplier (61%) more

689 Citations

Journal ArticleDOI: 10.1109/JSSC.1983.1052012
Abstract: The commonly used two-stage CMOS operational amplifier suffers from two basic performance limitations due to the RC compensation network around the second gain stage. First, it provides stable operation for only a limited range of capacitive loads, and second, the power supply rejection shows severe degradation above the open-loop pole frequency. The technique described provides stable operation for a much larger range of capacitive loads, as well as much improved V/SUB BB/ power supply rejection over very wide bandwidths for the same basic operational amplifier circuit. The author presents a mathematical analysis of this new technique in terms of its frequency and noise characteristics followed by its implementation in all n-well CMOS process. Experimental results show 70-dB negative power supply rejection at 100 kHz and an input noise density of 58 nV/(Hz)/SUP 1/2/ at 1 kHz. more

502 Citations

Journal ArticleDOI: 10.1109/JSSC.1982.1051851
Abstract: Presents an overview of current design techniques for operational amplifiers implemented in CMOS and NMOS technology at a tutorial level. Primary emphasis is placed on CMOS amplifiers because of their more widespread use. Factors affecting voltage gain, input noise, offsets, common mode and power supply rejection, power dissipation, and transient response are considered for the traditional bipolar-derived two-stage architecture. Alternative circuit approaches for optimization of particular performance aspects are summarized, and examples are given. more

484 Citations

Harry P. Levin1Institutions (1)
25 May 1979-
Abstract: A Hall sensing apparatus having a large dynamic range is adapted for generating a current signal substantially in phase with the current in a conductor. The Hall sensing apparatus has a magnetic field concentrator assembly with oppositely disposed pick-up plates, each with a centrally attached concentrator rod for being symmetrically positioned on either side of the conductor. A Hall sensor element is wholly positioned in the space between the ends of the rods remote from the plates. A current circuit, having an externally controlled current varying device and temperature drift control device in series with a current source, provides a Hall current through the sensor element. A detection circuit, coupled across the width of the sensor element, provides an inverted and non-inverted signal in phase with the conductor current which are coupled to the inverting input of a summing amplifier. A reference voltage is then coupled to the non-inverting input of the summing amplifier to generate a dc bias offset control signal which is coupled, in a negative feedback configuration, to control the Hall current and thereby decrease the dc offset bias. more

Topics: Hall effect sensor (64%), Current sensor (62%), Fiber optic current sensor (62%) more

483 Citations

Journal ArticleDOI: 10.1109/JSSC.1987.1052715
E. Sackinger1, W. GuggenbuhlInstitutions (1)
Abstract: An extension of the op-amp concept featuring two differential inputs is presented. In a closed-loop environment this circuit forces two floating voltages to the same value, and thus has many interesting applications in the analog circuit domain. A description of such a circuit, its nonidealities, and restrictions are given. A monolithic integration of this differential difference amplifier is implemented in a double-poly CMOS technology, its measured characteristics are described. Many applications of this circuit, including a voltage comparator with floating inputs, a voltage inverter without resistors, and an instrumentation amplifier with only two external gain determining resistors, are discussed. more

387 Citations

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Topic's top 5 most impactful authors

Ahmed M. Soliman

8 papers, 175 citations

Johan H. Huijsing

7 papers, 120 citations

Stephan J. G. Gift

5 papers, 39 citations

Heimo Uhrmann

4 papers, 22 citations

Omid Shoaei

4 papers, 55 citations

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