Journal ArticleDOI
Circuit techniques for reducing the effects of op-amp imperfections: autozeroing, correlated double sampling, and chopper stabilization
Christian Enz,Gabor C. Temes +1 more
- Vol. 84, Iss: 11, pp 1584-1614
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TLDR
In this paper, some old and new circuit techniques are described for the compensation of the amplifier's most important nonideal effects including the noise (mainly thermal and 1/f noise), the input-referred dc offset voltage as well as the finite gain.Abstract:
In linear IC's fabricated in a low-voltage CMOS technology, the reduction of the dynamic range due to the dc offset and low frequency noise of the amplifiers becomes increasingly significant. Also, the achievable amplifier gain is often quite low in such a technology, since cascoding may not be a practical circuit option due to the resulting reduction of the output signal swing. In this paper, some old and some new circuit techniques are described for the compensation of the amplifier's most important nonideal effects including the noise (mainly thermal and 1/f noise), the input-referred dc offset voltage as well as the finite gain resulting in a nonideal virtual ground at the input.read more
Citations
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Proceedings ArticleDOI
Development of robust analog and mixed-signal electronics for extreme environment applications
S.C. Terry,Benjamin J. Blalock,Jeremy Jackson,Suheng Chen,C. Durisety,M.M. Mojarradi,Elzbieta Kolawa +6 more
TL;DR: The Integrated Circuits and Systems Laboratory at the University of Tennessee is currently investigating robust CMOS analog and mixed-signal circuit design techniques for extreme environments as discussed by the authors, which focus on developing high performance operational transconductance amplifiers (OTAs) and op-amps that can operate over a wide temperature range.
Journal ArticleDOI
Digital lock-in techniques for adaptive power-line interference extraction
TL;DR: This paper presents a simple digital approach for adaptive power-line (PL) or other periodic interference extraction by means of two digital square (or sine) wave mixers, which is suitable for real-time operation with popular low-cost microcontrollers.
Journal ArticleDOI
Improving the Accuracy of Capacitance-to-Frequency Converter by Accumulating Residual Charges
TL;DR: A more accurate capacitance-to-frequency converter, which produces a single pulse stream in a wide range of frequencies and saves residual charges and accumulates them when discharging an integrator capacitor.
Proceedings ArticleDOI
HeadFi: bringing intelligence to all headphones
Fan Xiaoran,Longfei Shangguan,Siddharth Rupavatharam,Yanyong Zhang,Jie Xiong,Yunfei Ma,Richard Howard +6 more
TL;DR: In this paper, a plug-in peripheral connecting the headphones and the pairing device (e.g., a smartphone) is proposed to enable new applications spanning across mobile health, user interface, and context-awareness.
References
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Book
Principles of Data Conversion System Design
TL;DR: This advanced text and reference covers the design and implementation of integrated circuits for analog-to-digital and digital-toanalog conversion and systematically leads the reader to advanced topics, describing design issues and techniques at both circuit and system level.
Journal ArticleDOI
A 4-MHz CMOS continuous-time filter with on-chip automatic tuning
Francois Krummenacher,N. Joehl +1 more
TL;DR: This paper presents a 3rd order low-pass continuous-time filter with 4 MHz cut-off frequency, integrated in a 3 μm CMOS process, based on the direct simulation of a doubly-terminated LC ladder using capacitors and fully-balanced, current-controlled transconductance amplifiers with extended linear range.
Proceedings Article
A 4-MHz CMOS Continuous-Time Filter with On-Chip Automatic Tuning
Francois Krummenacher,N. Joehl +1 more
TL;DR: In this article, a 3rd order low-pass continuous-time filter with 4 MHz cut-off frequency, integrated in a 3?m CMOS process, is presented, based on direct simulation of a doublyterminated LC ladder using capacitors and fully-balanced, current-controlled transconductance amplifiers with extended linear range.
Journal ArticleDOI
Design techniques for high-speed, high-resolution comparators
Behzad Razavi,Bruce A. Wooley +1 more
TL;DR: In this article, precision techniques for the design of comparators used in high-performance analog-to-digital converters employing parallel conversion stages are described, and circuit designs achieving 12-b resolution in both BiCMOS and CMOS 5-V technologies are presented.
MonographDOI
Switched-currents : an analogue technique for digital technology
TL;DR: This book discusses the evolution of Analogue Sampled-Data Signal Processing, the architecture of Switched-Current Circuits, and the non-linear Behaviour of Switches-Current Memory Circuits.