Journal ArticleDOI
A Power-Aware Chopper-Stabilized Instrumentation Amplifier for Resistive Wheatstone Bridge Sensors
Geok Teng Ong,Pak Kwong Chan +1 more
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TLDR
A power-aware instrumentation amplifier (IA) based on differential difference amplifier (DDA) dedicated to a resistive Wheatstone bridge sensor system that incorporates a proposed current source replica (CSR) circuit that facilitates the pair matching layout for all critical pairs in DDA input stage.Abstract:
This paper presents a power-aware instrumentation amplifier (IA) based on differential difference amplifier (DDA) dedicated to a resistive Wheatstone bridge sensor system. The design incorporates a proposed current source replica (CSR) circuit that facilitates the pair matching layout for all critical pairs in DDA input stage. This is in contrast with the conventional design where the stated layout technique can only be applied to the input transistor pairs. Besides, a new analysis on common-mode signals and differential common-mode signal in chopper-stabilized DDA is given. It has shown that the differential common-mode signal is not modulated in chopping DDA. The relationship between dc offset and differential common-mode rejection ratio (CMRRd) is illustrated. Enhancing CMRRd will lead to reduction of dc offset and offset drift in DDA. Fabricated by a 0.18-μm CMOS process, the experimental results have shown that the maximum input-referred offset for the injection-nulling switch chopper DDA with CSR circuit is 3 μV, while the input-referred dc offset is 1.78 μV (mean + standard deviation) at a chopping frequency of 10 kHz from eight fabricated samples. For a closed-loop gain of 40.17 dB, its output ripple is reduced by three times with respect to itself without CSR. The IA powered with a high-power supply rejection regulator has been tested with a resistive Wheatstone bridge. The transducer achieves an input-referred noise of 3.76 μVrms for 2-kHz bandwidth.read more
Citations
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Journal ArticleDOI
A Chopper Instrumentation Amplifier With Input Resistance Boosting by Means of Synchronous Dynamic Element Matching
TL;DR: A method to increase the parasitic input resistance caused by application of chopper modulation to indirect current feedback instrumentation amplifiers is proposed and the result is obtained by applying dynamic element matching to the input and feedback ports at the same frequency as choppers.
Journal ArticleDOI
Low-voltage subthreshold CMOS current mode circuits: Design and applications
TL;DR: In this paper, a gm/ID-based design methodology for low voltage current mode circuits using standard CMOS technology is presented, and a second generation current conveyor and a current feedback operational amplifier (CFA) are designed using the discussed design procedure.
Journal ArticleDOI
A 0.4-V Miniature CMOS Current Mode Instrumentation Amplifier
TL;DR: The proposed OFCC is designed and implemented in both TSMC low-power 90-nm and UMC high-speed 130-nm CMOS technology for use in low-voltage applications and shows promising results.
Journal ArticleDOI
A Novel High-Precision Digital Tunneling Magnetic Resistance-Type Sensor for the Nanosatellites’ Space Application
TL;DR: A novel high-precision miniaturized three-axis digital tunneling magnetic resistance-type (TMR) sensor that has a less power consumption, a smaller size, and higher resolution than otherminiaturized magnetometers by comparison is proposed.
Proceedings ArticleDOI
New Current Mode Wheatstone Bridge Topologies with Intrinsic Linearity
TL;DR: In this paper, two new topologies for current-mode Wheatstone bridge (CMWB) are presented, which are based on two second generation voltage conveyors (VCII) as basic building blocks and two nMOS transistors operating as variable resistor.
References
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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
TL;DR: 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.
Book
The Art of Analog Layout
TL;DR: In this article, the authors present a detailed discussion of the application of Bipolar Transistors in a CMOS process and their application in a variety of applications, including the following: 1. Semiconductors.
Journal ArticleDOI
Device mismatch and tradeoffs in the design of analog circuits
TL;DR: This paper explores the impact of random device mismatch on the performance of general analog circuits and results in a fixed bandwidth-accuracy-power tradeoff which is independent of bias point for bipolar circuits whereas for MOS circuits some bias point optimizations are possible.
Journal ArticleDOI
A 2 $\mu\hbox{W}$ 100 nV/rtHz Chopper-Stabilized Instrumentation Amplifier for Chronic Measurement of Neural Field Potentials
TL;DR: The monolithic architect and micropower low-noise low-supply operation could help enable applications ranging from neuroprosthetics to seizure monitors that require a small form factor and battery operation.
Journal ArticleDOI
A versatile building block: the CMOS differential difference amplifier
E. Sackinger,W. Guggenbuhl +1 more
TL;DR: An extension of the op-amp concept featuring two differential inputs, 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.
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