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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Journal ArticleDOI
An integrated LMS adaptive filter of TX leakage for CDMA receiver front ends
TL;DR: The theory and practical implementation of a continuous-time LMS adaptive filter of the TX leakage in CDMA receivers are described, which achieved the maximum TXRR of 28 dB, which was limited by the reference signal coupling.
Journal ArticleDOI
Electronically Temperature Compensated Silicon Bulk Acoustic Resonator Reference Oscillators
TL;DR: The paper describes the design and implementation of an electronically temperature compensated reference oscillator based on capacitive silicon micromechanical resonators that exhibits a frequency drift of 39 ppm over 100degC as compared to an uncompensated frequency drift over the same range.
Journal ArticleDOI
A Single-Trim CMOS Bandgap Reference With a $3\sigma$ Inaccuracy of $\pm$ 0.15% From ${-}$ 40 $^{\circ}$ C to 125 $^{\circ}$ C
TL;DR: In this paper, a CMOS bandgap reference with an inaccuracy of ± 0.15% (3 σ) from -40°C to 125°C is presented, which requires only a single trim to achieve this level of precision.
Journal ArticleDOI
A 160 $\mu{\rm A}$ Biopotential Acquisition IC With Fully Integrated IA and Motion Artifact Suppression
TL;DR: A 3-channel biopotential monitoring ASIC with simultaneous electrode-tissue impedance measurements which allows real-time estimation of motion artifacts on each channel using an an external μC, capable of actual motion artifact suppression in the analog domain before final amplification.
Proceedings ArticleDOI
A Micropower Chopper-Stabilized Operational Amplifier using a SC Notch Filter with Synchronous Integration inside the ContinuousTime Signal Path
Rodney T. Burt,Joy Y. Zhang +1 more
TL;DR: A micropower chopper-stabilized opamp uses an SC notch filter with synchronous integration inside the CT signal path to eliminate chopping noise.
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.