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This paper presents a detailed analysis on the relationship between quality factor (Q) and the amplitude of CMOS LC VCO. It is shown that controlled voltage amplitude is benefit for acquiring a large Q of the oscillator. Low power and phase noise of LC VCO can be optimized by tuning Q of tank. The analysis has been carried out both theoretically and by simulation for the design of a low power and...
This paper presents a wide frequency range, low power dissipation CMOS voltage controlled ring oscillator based on three-stage differential current-steering amplifiers (CSA) cell. The frequency of oscillator has a highly linear relationship with voltage. The VCO circuit realized through 0.18 mum CMOS process parameter shows wide operating frequency from 1.624 GHz to 3.229 GHz. The simulation result...
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