Multi-phase voltage-controlled oscillator
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United States of America Patent
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Apr 28, 2015
Grant Date -
Oct 16, 2014
app pub date -
Dec 19, 2011
filing date -
Dec 19, 2011
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Abstract
Embodiments provide a multi-phase voltage controlled oscillator (VCO) that produces a plurality of output signals having a common frequency and different phases. In one embodiment, the VCO may include a passive conductive structure having a first ring and a plurality of taps spaced around the first ring. The VCO may further include a capacitive load coupled to the passive conductive structure, one or more feedback structures coupled between a pair of opposing taps of the plurality of taps, and one or more current injection devices coupled between a pair of adjacent taps of the plurality of taps.
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