Shunt-Feedback Ring Oscillator: a New Topology for Wideband Multiphase Signal Generations

A negative-feedback scheme is applied to the gain stage of RC and LC ring oscillators to extend the frequency tuning range and to enhance the maximum oscillation frequency, respectively. This can be achieved without penalties in power consumption, supply voltage and silicon area. To verify the operation of the proposed topology, the theory of a three-stage shunt-feedback ring oscillator has been developed and compared with simulation results. Differential versions of 1.2-V shuntfeedback RC and LC ring oscillators operating, respectively, at 5 GHz and 11.6 GHz are demonstrated by simulations using a 0.18-μm CMOS technology.


Published in:
Proceedings of the IEEE International Workshop on Radio-Frequency Integration Technology, 78-81
Presented at:
IEEE International Workshop on Radio-Frequency Integration Technology (RFIT 2007), Singapore, December 9-11, 2007
Year:
2007
Laboratories:


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 Record created 2011-03-31, last modified 2018-03-17

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