Wide range/high speed low power CMOS VCO
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United States of America Patent
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Jan 4, 2011
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N/A
app pub date -
Oct 6, 2008
filing date -
Oct 6, 2008
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Abstract
A VCO circuit having low jitter and low PSS (power supply sensitivity). The VCO circuit includes a first ring oscillator stage, a second ring oscillator stage coupled to the first ring oscillator stage, and a VCO input coupled to both the first ring oscillator stage and the second ring oscillator stage for receiving a control voltage. Each of the first ring oscillator stage and the second ring oscillator stage further includes a CMOS inverter with a plurality of cross coupled transistors to implement oscillation of the VCO circuit.
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