17-07-2012, 04:33 PM
PHASE LOCKED LOOP
PHASE LOCKED LOOP.docx (Size: 146.24 KB / Downloads: 159)
AIM:
The goal of this experiment is to make you aware of the functionality of the PhaseLocked Loop, commonly referred to as PLL. The PLL is mainly used for generating stable, high-frequency clocks in the 100 MHz - GHz range.
THEORY:
Crystals can be used to generate stable clocks in the range of a few hundreds of kHz to a few MHz. If we need stable clocks of much larger frequency, we can use the clock wavefrom from the crystal source as a reference clock and additional analog circuits to multiply the frequency of the reference clock. Such a circuit is called a phase locked loop.
Results :
1.We designed the Phase locked loop and we have plotted the waveform of transient response