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EE486 Digital VLSI- Final Project Clock Multiplying DPLL Chen Zhai Klipsch School of Electrical and Computer Engineering New Mexico State University [email_address]
Presentation Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Block Diagram
Specification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Loop Filter Spec: Input Frequency Natural Frequency (~Bandwidth) Damping Factor Results: Design Values: R, C1, C2, Ipump Performance: Lock time, etc
Linearized  Current-Starved  VCO  with Output Buffers
Linearized  Current-Starved  VCO  Tuning Curve Vin_max=1.8V Vin_min=Vtn=0.5V Fmax=1.068GHz Fmin=83.26MHz Kvco=758MHz/V
Divide by 5 Circuit Sequence: 000 001 0 1 0 0 1 1 100 Synchronous Reset
High-speed Phase Frequency Detector
Charge-pump
DPLL Schematic
DPLL Test-bench
Simulation Result
Simulation Result
Simulation Result
Simulation Result-Locked
Measurement Result Key Parameters of DPLL: Natural Frequency (Bandwidth) Matching (delay, current of charge-pump) Speed (Divide-by-5) Output Frequency 750.00MHz Jitter 10.2ps Lock time ~0.5 us

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PLL (Tsmc 0.18 process)