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A low noise 0 . 8 p CMOS Phase Locked Loop (PLL) with a maximum output frequency of 120MHz has been developed for a pixel clock generator for a range of computer monitors. Other applications include computer clock generation and disk drives. The synthesizer requires no external components. A low phase noise has been achieved through supply rejection techniques, by placing the oscillator in a high gain feedback loop to minimize its noise contribution, and by dynamically adjusting the PLL bandwidth to maximize the open loop gain.

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