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A novel low power 8-bit digitally controlled oscillator in 0.18 µm CMOS technology is designed and implemented. It consumes only 12.6 mW to oscillate at 3.44 GHz. Sub-feedback technique is used to produce stable quadrature output with even number of stages. Tuning frequency range is from 1.2 GHz to 3.44 GHz, i.e., it has tuning width of about 97%. Phase noise of −110.9 dBc/Hz is achieved at 3.44 GHz...
A 14-bit digitally controlled ring oscillator (DCO) with operating frequency up to 1 GHz in 0.18 µm CMOS technology is designed. The design used digital control to obtain higher output voltage swing and to get lower flicker noise compared to the analog counterpart. To make the oscillator oscillate and to get stable quadrature output in the even number of stages, feed-forward technique is used. Designed...
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