lec15_design_power_delivery_networks

lec15_design_power_delivery_networks - Design of Power...

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Design of Power Delivery Networks Design of Power Delivery Networks I/Os
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Design of Power Delivery Networks PDN and Signal Lines Incorrect Model
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Design of Power Delivery Networks Importance of Current Loops and Power Supply Noise
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Design of Power Delivery Networks Planes o Planes are two dimensional structures o Difficult to use Microcap to analyze such structures o Sphinx can be used to obtain the frequency response (Demo on 3/6) o The frequency response can be converted into a model for time domain simulation o This is the procedure we will use in this class
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Design of Power Delivery Networks An Example – A Test Vehicle An Example – A Test Vehicle 0.3 inch (7.6 mm) 30 mils 34 mils 4 mils 4 mils 20 inches (50 cm) Consists of planes, transmission lines and drivers Seven-layered board: four power planes and three signal layers - 4 power planes: Vdd1/Gnd1/Vdd2/Gnd2 planes - 3 signal layers: sig1/sig2/sig3 layers Stack-up of the test vehicle:sig1/Vdd1/Gnd1/sig2/sig3/Vdd2/Gnd2
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Design of Power Delivery Networks 0.3 inch (7.6 mm) 30 mils 34 mils 4 mils 4 mils 20 inches (50 cm) Test Vehicle Details Test Vehicle Details Power planes - Dimension / Separation - Dielectric material: FR4 - Right side / Left side Driver - TI ABT244 buffer driver - Get powered from Vdd1 / Gnd1 plane pair Sig1 layer : - Top interconnects - Microstrip - Dimension - 22 ohms Sig2 layer / Sig3 layer : - Embedded striplines - 50 ohms - Input connection
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Design of Power Delivery Networks Noise phenomena Noise phenomena No termination Low- to-High transition 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 x 10 -7 -2 0 2 4 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 x 10 -7 4 5 6 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
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This note was uploaded on 04/28/2008 for the course ECE 4460 taught by Professor Swaminathan during the Spring '08 term at Georgia Institute of Technology.

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lec15_design_power_delivery_networks - Design of Power...

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