模拟电路设计第7章.ppt

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1、Chapter 7NoiseCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.1Electronic NoiseCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blaloc

2、k,University of Virginia.2Noise PowerOr,for convenience,Copyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.3Noise SpectrumCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or di

3、splay.Slides prepared by Travis N.Blalock,University of Virginia.4Noise ShapingCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.5Noise Source CorrelationThird term vanishes for uncorrelated sources.Copy

4、right The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.6Correlated and Uncorrelated Noise SourcesCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N

5、.Blalock,University of Virginia.7Thermal NoiseCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.8MOSFET Thermal NoiseParameter is typically 2/3 for long channel,as high as 2.5 for submicron devices.Copyr

6、ight The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.9FET Ohmic Noise SourcesCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University

7、 of Virginia.10FET Flicker NoiseCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.11Flicker Noise CornerCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prep

8、ared by Travis N.Blalock,University of Virginia.12Noise in CircuitsExample 7.7M1 thermal+M1 flicker+RD thermalCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.13Input Referred NoiseInput referred noise

9、is fictitious quantity that allows comparison between different circuits.Copyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.14Example 7.7 revisitedCopyright The McGraw-Hill Companies,Inc.Permission requir

10、ed for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.15Is Input Voltage Noise Sufficient?Copyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.16Input Referred Noise Volt

11、age and CurrentCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.17Useful TransformationA noise source can be transformed from a drain-source current to a gate series voltage for arbitrary Zs.(page 224)C

12、opyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.18Common-Source StageCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,Universit

13、y of Virginia.19Common GateCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.20Common Gate(ro large)Copyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared

14、 by Travis N.Blalock,University of Virginia.21Common Gate BiasDesire to minimize gm2,but this degrades active-region voltage swing.Copyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.22Common Gate 1/f nois

15、eCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.23Common Gate 1/f noiseCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,Unive

16、rsity of Virginia.24Source FollowerCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.25Cascode StageCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared

17、 by Travis N.Blalock,University of Virginia.26Differential PairCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.27Diff.Pair Cont.Copyright The McGraw-Hill Companies,Inc.Permission required for reproduct

18、ion or display.Slides prepared by Travis N.Blalock,University of Virginia.28Diff.Pair Cont.Copyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.29Noise BandwidthCopyright The McGraw-Hill Companies,Inc.Permission required for reproduction or display.Slides prepared by Travis N.Blalock,University of Virginia.30