PowerPoint PresentationSlide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Class D Amplifier Summary- Review ConceptsSlide 13Slide 14Slide 15Slide 16Slide 17EE42/100 Fall 2005Prof. Fearing1Week 14b/ Lecture 25 Dec. 1, 2005Example Applications1. Class D Audio Amplifier•(phasors, opamp, MOSFET)2. Atomic Force MicroscopeEE42/100 Fall 2005Prof. Fearing2www.irf.com/product-info/audio/classdtutorial.pdfTraditional Linear AmplifierEE42/100 Fall 2005Prof. Fearing3Example: Vcc = 25V, load = 1 ohms, IXYS 24N50currentEE42/100 Fall 2005Prof. Fearing4EE42/100 Fall 2005Prof. Fearing5http://www.extron.com/technology/archive.asp?id=ts122001How Pulse Width Modulation WorksEE42/100 Fall 2005Prof. Fearing6vohttp://users.ece.gatech.edu/~mleach/ece4435/f01/ClassD2.pdfHow a Triangle Output Oscillator Works (relaxation oscillator)V1-V1vTvoEE42/100 Fall 2005Prof. Fearing7Output Stage|H()|-50V+50VVLVinEE42/100 Fall 2005Prof. Fearing8Whole Class D amplifierEE42/100 Fall 2005Prof. Fearing9feedbackIntegrator and Input CircuitryEE42/100 Fall 2005Prof. Fearing10Quantize and Gate DriveEE42/100 Fall 2005Prof. Fearing11Output SectionGate DriverEE42/100 Fall 2005Prof. Fearing12Class D Amplifier Summary- Review Conceptspush-pull output (load line) (compare to CMOS output)diode limiterop amp integrator1 bit quantizer (comparator)protection logicpush-pull output (load line) (compare to CMOS output)low pass filterEE42/100 Fall 2005Prof. Fearing132. Example Micromechatronic System: Atomic Force Microscopehttp://stm2.nrl.navy.mil/how-afm/how-afm.htmlEE42/100 Fall 2005Prof. Fearing14EE42/100 Fall 2005Prof. Fearing15http://stm2.nrl.navy.mil/how-afm/how-afm.htmlEE42/100 Fall 2005Prof. Fearing16Target density: 1 terabit/sq. in.Example Application: Atomic Force Microscopy/Data Storagehttp://www.zurich.ibm.com/st/storage/millipede.htmlEE42/100 Fall 2005Prof. Fearing17Example Application: Atomic Force Microscopy/Data StorageTarget density: 1 terabit/sq. in.http://www.zurich.ibm.com/st/storage/millipede.htmlthermal
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