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

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 of a Fourth-Order Sigma-Delta Modulator for Audio Application

2013 ◽  
Vol 380-384 ◽  
pp. 3580-3583
Author(s):  
Ming Yuan Ren ◽  
Tuo Li ◽  
Chang Chun Dong
Keyword(s):  
High Resolution ◽  
Fourth Order ◽  
High Performance ◽  
Sampling Frequency ◽  
Cmos Process ◽  
Sigma Delta Modulator ◽  
Sigma Delta

Based on requirements on high performance and high resolution of modulators, a fourth-order Sigma-Delta modulator for audio application is developed in this paper. The modulator is designed under the commercial 0.5μm CMOS process and the circuits are given simulations by Spectre. The sampling frequency of sigma-delta modulator is 11.264 MHz, and OSR is 256 within the 22 kHz signal bandwidth. Measure performance shows that Sigma-Delta modulator enables its maximum SNR to achieve 103.5dB, and the accuracy of Sigma-Delta modulator is up to 16 bit.

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 high-performance accelerometer with a fifth-order sigma–delta modulator

2005 ◽  
Vol 15 (7) ◽  
pp. S22-S29 ◽  
Author(s):  
Yufeng Dong ◽  
Michael Kraft ◽  
Carsten Gollasch ◽  
William Redman-White
Keyword(s):  
High Performance ◽  
Sigma Delta Modulator ◽  
Sigma Delta ◽  
Fifth Order
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