A novel 14-bit digitally controlled ring oscillator

Prapto Nugroho,R K Pokharel,A Anand,H Kanaya,K Yoshida

2012 Japan-Egypt Conference on Electronics, Communications and Computers（2012）

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摘要

A novel 14-bit digitally controlled ring oscillator is designed in 0.18 µm CMOS technology. Sub-feedback technique is used to increase the output frequency that produces stable oscillation with even number of stages. Frequency can be tuned from 674 MHz to 4 GHz. Phase noise at 4 GHz carrier frequency and 4 MHz offset is −119.4dBc/Hz. Figure of Merit (FoM) calculated is 156 dBc/Hz.

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关键词

cmos integrated circuits,tuning,digital controller,transistors,phase noise,cmos technology,oscillations,ring oscillator,digitally controlled oscillator,figure of merit,oscillators

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