High performance operational amplifiers and comparators

2011 ◽  
pp. 41-64
Author(s):  
M. Steyaert ◽  
W. Sansen
Keyword(s):  
High Performance ◽  
Operational Amplifiers

scholarly journals Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators

2018 ◽  
Vol 27 (11) ◽  
pp. 1850170 ◽  
Author(s):  
Georgia Tsirimokou ◽  
Aslihan Kartci ◽  
Jaroslav Koton ◽  
Norbert Herencsar ◽  
Costas Psychalinos
Keyword(s):  
Comparative Study ◽  
Fractional Order ◽  
High Performance ◽  
Continued Fraction ◽  
Transfer Functions ◽  
Operational Amplifiers ◽  
Current Conveyors ◽  
Continued Fraction Expansion ◽  
Current Feedback ◽  
Discrete Component

Due to the absence of commercially available fractional-order capacitors and inductors, their implementation can be performed using fractional-order differentiators and integrators, respectively, combined with a voltage-to-current conversion stage. The transfer function of fractional-order differentiators and integrators can be approximated through the utilization of appropriate integer-order transfer functions. In order to achieve that, the Continued Fraction Expansion as well as the Oustaloup’s approximations can be utilized. The accuracy, in terms of magnitude and phase response, of transfer functions of differentiators/integrators derived through the employment of the aforementioned approximations, is very important factor for achieving high performance approximation of the fractional-order elements. A comparative study of the accuracy offered by the Continued Fraction Expansion and the Oustaloup’s approximation is performed in this paper. As a next step, the corresponding implementations of the emulators of the fractional-order elements, derived using fundamental active cells such as operational amplifiers, operational transconductance amplifiers, current conveyors, and current feedback operational amplifiers realized in commercially available discrete-component IC form, are compared in terms of the most important performance characteristics. The most suitable of them are further compared using the OrCAD PSpice software.

Design and Simulation of High Performance Carbon Nanotube Based Three Stage Operational Amplifiers

2016 ◽  
Vol 3 (2) ◽  
pp. 449-453 ◽  
Author(s):  
M. Nizamuddin ◽  
Sajad A. Loan ◽  
Shuja A. Abbasi ◽  
Abdul Rahman M. Alamoud
Keyword(s):  
Carbon Nanotube ◽  
High Performance ◽  
Operational Amplifiers

A 16-bit sigma-delta A/D converter with high-performance operational amplifiers

1994 ◽  
Vol 6 (2) ◽  
pp. 105-119 ◽  
Author(s):  
Joongho Choi ◽  
Bing J. Sheu ◽  
Bang W. Lee
Keyword(s):  
High Performance ◽  
Operational Amplifiers ◽  
Sigma Delta

A Design of High Performance CMOS Folded Cascode Operational Amplifier

2014 ◽  
Vol 981 ◽  
pp. 31-35
Author(s):  
Zhe Fei Wang ◽  
Yi Jiang Cao ◽  
Ju Meng Feng
Keyword(s):  
High Performance ◽  
High Gain ◽  
Operational Amplifiers ◽  
Cmos Process ◽  
Voltage Noise ◽  
Strong Suppression ◽  
Rejection Ratio ◽  
Folded Cascode ◽  
Cascode Amplifier ◽  
Large Output

This paper describes a kind of folded cascode amplifier, which not only has high gain, large output swing characteristics, and its outputs can be self-compensation, it has a strong suppression capability with voltage noise. Based on a 0.5μm CMOS process uses two operational amplifiers. Through software emulation corrected the error which was caused by theoretical calculation. Has good performance in gain, noise, swing, phase margin, common mode rejection ratio and other parameters.

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

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