Reconfigurable multi-path injection locked oscillator
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United States of America Patent
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Nov 3, 2015
Grant Date -
Apr 9, 2015
app pub date -
Oct 3, 2013
filing date -
Oct 3, 2013
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Abstract
A ring oscillator comprising three or more delay cells, each of which comprises a plurality of differential input leads and a differential output lead, wherein each of the plurality of differential input leads comprises one or more inverters, wherein the three or more delay cells are inter-connected forming a plurality of loop paths, wherein each loop path connects the differential output lead of each delay cell to a corresponding differential input lead of another delay cell, wherein each loop path provides an inverter strength determined by a number of inverters in a corresponding differential input lead of each delay cell, wherein the plurality of loop paths are configured to generate an oscillating signal with an operating frequency, and wherein the operating frequency is tunable by digitally adjusting one or more inverter strengths in one or more of the plurality of loop paths.
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