TWiki's ColdFeedback web
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback
The ColdFeedback web of TWiki. TWiki is a Web-Based Collaboration Platform for the Enterprise.en-usCopyright 2020 Winterland Cosmology Lab, McGill University, Montréal, Québec, CanadaSaurabh Singh [winterlandpurchaseorders@gmail.com]The contributing authors of TWikiTWikiPowered by TWiki.ColdFeedback
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback
http://www.mcgillcosmology.com/twiki/pub/TWiki/TWikiLogos/T-logo-140x40-t.gifWebHome
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/WebHome
This Cold Feedback web contains a collection of studies/projects on feedback on or due to cryogenic circuits. For example, the DAN and DAF projects use the DfMUX board ... (last changed by TijmenDeHaan)2016-06-13T22:22:46ZTijmenDeHaanWebTopicCreator
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/WebTopicCreator
(last changed by JoshuaMontgomery)2016-01-26T18:54:58ZJoshuaMontgomerySineMixer
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/SineMixer
Sine Wave Mixer The transfer function of a sine wave mixer acting on broadband white noise is 1/sqrt(2). There is a factor of sqrt(2) from adding the left and right ... (last changed by TijmenDeHaan)2014-02-17T19:55:49ZTijmenDeHaanIntroToDan
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/IntroToDan
Intro To DAN WARNING This page is out of date and essentially useless as of 8Jun2012. Where To Start Install DAN Firmware Installing the firmware means starting ... (last changed by TijmenDeHaan)2012-06-08T19:20:41ZTijmenDeHaanTestingDafFirmware
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/TestingDafFirmware
Testing DAF Firmware Motivation The Digital Active Feedback (DAF) firmware is work in progress, mainly involving Adam, Graeme and Tijmen. The initial attempt at making ... (last changed by TijmenDeHaan)2011-11-17T00:44:28ZTijmenDeHaanStrongElectrothermalFeedback
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/StrongElectrothermalFeedback
Strong Electrothermal Feedback Introduction I am trying to simulate a bolometer using Simulink (an addon to MATLAB). I start from equation (3.6) in Trevor's thesis ... (last changed by TijmenDeHaan)2011-11-17T00:44:27ZTijmenDeHaanGainContraints
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/GainContraints
Gain Contraints For gain/impedance alone can consider the equivalent circuit for the tranformer of a capacitor, inductor and resistor in parallel. The resistance of ... (last changed by TijmenDeHaan)2011-11-17T00:44:19ZTijmenDeHaanStrongElectrothermalFeedback2
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/StrongElectrothermalFeedback2
Active Feedback The following diagram shows the simplest possible reduction of the reading out of one bolometer. By approximation, we can group all the impedances ... (last changed by MattDobbs)2011-09-28T03:09:09ZMattDobbsDanInstability
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/DanInstability
DAN Oscillations Introduction This document is out of date. When a discrete time integrator is added to the feedback loop, stability is greatly improved. In order ... (last changed by TijmenDeHaan)2011-07-15T20:28:16ZTijmenDeHaanLCboardProjectFiles
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/LCboardProjectFiles
This page has the LC board design files May 2011 Altium files LCboard temp forAdam check 31May11.zip: LCboard temp forAdam check 31May11.zip Gerbers and fabrication ... (last changed by WinterlandUser)2011-06-27T16:42:03ZWinterlandUserSpiralInductors
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/SpiralInductors
WinterlandUser 2011 05 13 This is the page that considers replacing the inductors on the LC board with spiral inductors Design goals We like to replace the 16uH ... (last changed by WinterlandUser)2011-06-22T15:08:34ZWinterlandUserDanBodePlots
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/DanBodePlots
DAN Bode Plots Motivation Since DAN is an integral control loop, its transfer function can be written down analytically. DAN is linear, so the Bode plot contains ... (last changed by TijmenDeHaan)2011-06-15T20:30:30ZTijmenDeHaanLoopGainEquations
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/LoopGainEquations
Loop Gain Equations Motivation For voltage biased TES bolometers, knowing the steepness of the transition is very important. The most natural parametrization of that ... (last changed by TijmenDeHaan)2011-06-13T18:37:27ZTijmenDeHaanSonOfDAN
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/SonOfDAN
DAN Rework Motivation Matt noticed that DAN (in contrast to old style nulling) requires handling both the large "carrier" current through the bolometer and the small ... (last changed by GraemeSmecher)2011-04-20T18:23:37ZGraemeSmecherNewCICWorkbook
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/NewCICWorkbook
(last changed by GraemeSmecher)2010-12-03T21:47:20ZGraemeSmecherDigitalActiveFeedbackImplementation
http://www.mcgillcosmology.com/twiki/bin/view/ColdFeedback/DigitalActiveFeedbackImplementation
Implementation The main purpose of this page is to plan the path forward (outline TODO items) on implementing digital active feedback (DAF). Firmware Tijmen wrote ... (last changed by TijmenDeHaan)2010-12-02T15:17:24ZTijmenDeHaan
This topic: ColdFeedback > WebRss
Topic revision: r3 - 2005-03-28 - TWikiContributor