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Phase Locked Loop Design презентация
Содержание
- 1. Phase Locked Loop Design
- 2. Introduction What is a PLL? Control System Representation Parts of a PLL PLL in Simulink
- 3. What is a PLL? Digital frequency control
- 4. Control system representation
- 5. Modeling a PLL
- 6. PLL Control System
- 7. Parts of a PLL Phase Detector Filter Voltage Controlled Oscillator Programmable Counter
- 8. Parts of a PLL Phase Detector Acts
- 9. Parts of a PLL Filter Determines dynamic
- 10. Parts of a PLL Voltage Controlled Oscillator
- 11. Parts of a PLL Divider Divides the
- 12. PLL in Simulink
- 13. Questions?
Introduction What is a PLL? Control System Representation Parts of a PLL PLL in Simulink
Слайд 3What is a PLL?
Digital frequency control system
Generate high speed oscillations
Acquire and
track signals
Radio Frequency Demodulation
DX-ing
RF communications
Radio Frequency Demodulation
DX-ing
RF communications
Слайд 8Parts of a PLL
Phase Detector
Acts as comparitor
Produces a voltage proportional to
the phase difference between input and output signal
Voltage becomes a control signal
Voltage becomes a control signal
Слайд 9Parts of a PLL
Filter
Determines dynamic characteristics of PLL
Specify Capture Range (bandwidth)
Specify
Tracking Range
Receives signal from Phase Detector and filters accordingly
Receives signal from Phase Detector and filters accordingly
Слайд 10Parts of a PLL
Voltage Controlled Oscillator
Set tuning range
Set noise margin
Creates low
noise clock oscillation
Слайд 11Parts of a PLL
Divider
Divides the VCO output by the degree of
the open loop gain
Feedback loop allows phase comparison
Feedback loop allows phase comparison
