Journal ArticleDOI
A CMOS nested chopper instrumentation amplifier with 100 nV offset
A. Bakker,K. Thiele,Johan H. Huijsing +2 more
- Vol. 35, Iss: 12, pp 1877-1883
TLDR
In this paper, the authors presented an improvement of the chopper amplifier concept, called the nested helicopter amplifier, which reduced the residual offset to <100 nV, while retaining minimal thermal noise in the signal band.Abstract:
Offset and 1/f noise have been major enemies for analog IC designers since the enormous increase of the market for digital applications forced them to develop analog front ends in standard CMOS technology. Because static techniques like trimming cannot reduce 1/f noise, solutions had to be found in dynamic offset cancellation. The current work presents an improvement of the chopper amplifier concept, called the nested chopper amplifier. It is shown that with this architecture the residual offset is reduced to <100 nV, while retaining minimal thermal noise in the signal band.read more
Citations
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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 60 $\mu$ W 60 nV/ $\surd$ Hz Readout Front-End for Portable Biopotential Acquisition Systems
TL;DR: A low-power and low-noise readout front-end with configurable characteristics for Electroencephalogram (EEG), Electrocardiogram (ECG), and Electromyogram (EMG) signals is implemented with key to its performance is the new AC-coupled chopped instrumentation amplifier.
Journal ArticleDOI
A CMOS smart temperature sensor with a 3/spl sigma/ inaccuracy of /spl plusmn/0.1/spl deg/C from -55/spl deg/C to 125/spl deg/C
TL;DR: In this paper, a low-cost temperature sensor with on-chip sigma-delta ADC and digital bus interface was realized in a 0.5 /spl mu/m CMOS process.
Patent
Patient directed therapy control
TL;DR: In this paper, a patient can adjust therapy delivery by providing a volitional input that is detected by brain signals, wherein the volitional inputs may not require the interaction with another device, thereby eliminating the need for an external programmer to adjust therapy distribution.
Journal ArticleDOI
Temperature sensors and voltage references implemented in CMOS technology
TL;DR: It is shown that bipolar substrate transis- tors are very suited to be applied to generate the basic and PTAT voltages and dynamic element matching and auto-calibration can solve the problems related to mismatching of components and noise.
References
More filters
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.
Journal ArticleDOI
A CMOS chopper amplifier
TL;DR: In this article, a highly sensitive CMOS chopper amplifier for low-frequency applications is described, which is realized with a second-order low-pass selective amplifier using a continuous-time filtering technique.
Proceedings ArticleDOI
A low-noise chopper-stabilized differential switched-capacitor filtering technique
TL;DR: Describes the implementation of a wide dynamic range voiceband switched-capacitor filter using a differential chopper-stabilized configuration and experimental results from a fifth-order low-pass voiceband prototype are presented.
Journal ArticleDOI
A fully integrated, untrimmed CMOS instrumentation amplifier with submicrovolt offset
C. Menolfi,Qiuting Huang +1 more
TL;DR: In this article, a low-noise CMOS instrumentation amplifier intended for low-frequency thermoelectric microsensor applications is presented that achieves sub-microvolt offset and noise.
Journal ArticleDOI
An automatic offset compensation scheme with ping-pong control for CMOS operational amplifiers
Chong-Gun Yu,Randall L. Geiger +1 more
TL;DR: In this article, an automatic offset compensation scheme for CMOS operational amplifiers is presented, where offset is reduced by digitally adjusting the bias voltage of a programmable current mirror which is used as the load of the differential input stage.
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