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Compare the performance of Ring and LC oscillators in terms of phase noise, area, Q factor and application

Subject: CMOS VLSI Design

Topic: Mixed Signal Circuits

Difficulty: Medium

cvd • 1.1k  views
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Distinguish is as follows:

Ring Oscillator LC Oscillator
Circuit diagram
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fig. 3 stage ring oscillator
Circuit Diagram
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fig. LC tunned oscillator
Jitter is more in ring oscillator as compared to LC oscillator Jitter is less as compared to ring oscillator
Ring oscillator has worst phase noise Better phase noise performance
Requires smaller layout area compared to LC oscillator Layout area is more compared to ring oscillator
It has larger tunning range It has smaller tunning range
Applications: High speed clock synthesizer, VCO, PLL Applications: Wireless reciever for cellular use, VCO, PLL
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