INDUCTOR-CAPACITOR VOLTAGE-CONTROLLED OSCILLATOR WITH COMMON-MODE NOISE SEPARATION
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 21, 2023
filing date -
Sep 21, 2023
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Abstract
This disclosure is directed to a Voltage-Controlled Oscillator (VCO) with improved phase noise compared to other VCOs. The VCO may include a first cell and a second cell separated by common-mode (CM) isolation circuitry to reduce an amplitude of CM noise at an output signal. The CM isolation circuitry may inductively couple the first cell to the second cell for generating the output signal based on a resonant frequency range including resonant frequencies of the CM isolation circuitry, the first cell, and the second cell. As such, the first cell and the second cell may each include a portion of an entirety of the CM noise. In some cases, the portions of the CM noise on the first cell and/or the second cell may improve a signal to noise ratio of the output signal.
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