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Patent

Double sampled sigma delta modulator of second order having a semi-bilinear architecture

Angelo Nagari, +1 more
TLDR
In this article, a second-order double-sampled analog/digital ΣΔ converter using two fully differential switched-capacitors integrators coupled in cascade is presented.
Abstract: 
A second-order double-sampled analog/digital ΣΔ converter uses two fully differential switched-capacitors integrators coupled in cascade; the first integrator has a fully-floating double-sampled, bilinear switched capacitor input structure, whereas the second integrator has a double-sampled linear switched-capacitor input structure, achieving an excellent SNR with a reduced number of switches for a low consumption.

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Citations
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Patent

Chopper-stabilized analog-to-digital converter

Timothy J. Denison, +2 more
TL;DR: In this paper, a chopper-stabilized sigma-delta analog-to-digital converter (ADC) is proposed to provide accurate output at low frequency with relatively low power.
Patent

Delta - sigma modulators with improved noise performance

John L. Melanson, +1 more
TL;DR: An integrator stage for use in a delta sigma modulator includes an operational amplifier (312), an integration capacitor coupling to an output of the operational amplifier, and a summing node at an input of the operator as discussed by the authors.
Patent

Pressure sensing touch systems and methods

Minghan Chen, +5 more
TL;DR: In this paper, pressure at a touch location on a waveguide causes the waveguide to bend or flex, and the bending causes a change in the optical paths of light traveling by FTIR, which in turn causes the light distribution in the output light.
Patent

Implantable medical device with low power delta-sigma analog-to-digital converter

Michael B. Terry, +3 more
TL;DR: In this paper, the authors describe techniques for reducing power consumption within an implantable medical device (IMD) by using a quantizer that has a lower resolution than a digital-to-analog converter used for negative feedback.
Patent

Capacitive digital-to-analog converter reset in an implantable medical device analog-to digital converter

Michael W. Heinks, +2 more
TL;DR: In this paper, the authors describe techniques for capacitive digit-to-analog converter (CAPDAC) resetting in an implantable medical device (IMD) analog to digital converter (ADC).
References
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Patent

Switched capacitor filter utilizing a differential input and output circuit and method

Daniel Senderowicz
TL;DR: In this paper, an integrated circuit employing a differential amplifier and switched capacitor networks to provide filtering techniques is presented. But the differential amplifier utilizes a feedback circuit between its inputs and outputs, which allows for less noise and better power supply rejection.
Patent

Double-rate sampled signal integrator

David Byrd Ribner
TL;DR: In this paper, a sampled signal integrator is provided comprising of an amplifier, two pairs of capacitors, and a voltage bias coupled in shunt with each of the input terminals of the amplifier to provide a common mode bias to the integrator.
Journal ArticleDOI

A second-order double-sampled delta-sigma modulator using additive-error switching

T.V. Burmas, +3 more
- 01 Mar 1996 - 
TL;DR: In this article, a second-order double-sampled delta-sigma modulator is described, which uses an additive-error switching scheme to convert capacitor mismatch into an additive out-of-band tone that can be removed by a digital filter.
Patent

DC offset correction circuit utilizing switched capacitor differential integrator

Daniel Senderowicz
TL;DR: An integrated circuit employing a differential integrator and a switched capacitor network to provide auto-zeroing is presented in this article, where the average voltage of the output of the integrator is used to provide a correction of the DC offset.
Patent

Method and apparatus for adjusting the common-mode output voltage of a sample-and-hold amplifier

Xinping He
TL;DR: In this paper, a fully differential sample-and-hold amplifier 60 includes a common-mode feedback circuit 100 for adjusting the common mode input so that the commonmode output remains near a desired level.