Download - EE166 Project Frequency Dividers. Group Members Hengky Chandrahalim Toai Nguyen Mike Tjuatja
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EE166 Project
Frequency Dividers
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Group Members
• Hengky Chandrahalim
• Toai Nguyen
• Mike Tjuatja
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Inputs and Outputs Features
• Input– -1 Clk_In at 5V <200MHz– -1 RESET signal– -4 VDDs at 5V– -4 VSSs
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Inputs and Outputs Features
• Outputs– -1 Output at 5V = Clk_In/2– -1 Output at 5 V = Clk_In/3
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Key Specifications
• Skew DIV2-DIV3 < 1ns
• Symmetric Tr and Tf DIV2 < 800 ps
• Symmetric Tr and Tf DIV3 < 800 ps
• Duty Cycle : 45%-55%
• Output Load : 10pF
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Top Level View of Schematic
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Layout View
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Extracted View of Layout
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Divider Block
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Divide by 2 Block
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DFF Schematic
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DFF Layout
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Divide by 3 Block
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Layout Divide by 3
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Pulse Stretcher
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Test Bench
• Test functionality of the circuit
• Test the outputs skew
• Test Tr and Tf of the outputs
• Test the duty cycle
• Test the driving capability
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Schematic of the test bench
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Functionality
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Functionality
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Outputs Skew
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Duty Cycle Divide by 2
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Duty Cycle Divide by3
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Tr of Divide by2
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Tf of Divide by2
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Tr of Divide by 3
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Tf of Divide by3
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Conclusion• Process used for the design is AMI16• Total area used in the design is 1740.47 mil^2• The circuit is functional• Skew outputs is about 950 ps• Duty cycles 45%-55%• The circuit is capable of driving 20 pF load• Pavg=1/2 x CL x f x VDD^2
• Pavg=1/2 x 20pf x 100MHz x 25 = 25mW