Radio-frequency (RF) apparatus for digital frequency synthesizer including sigma-delta modulator and associated methods

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United States of America Patent

PATENT NO 11863192
APP PUB NO 20220337255A1
SERIAL NO

17855537

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Abstract

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An apparatus includes a digitally controlled oscillator (DCO), which includes an inductor coupled in series with a first capacitor. The DCO further includes a second capacitor coupled in parallel with the series-coupled inductor and first capacitor, a first inverter coupled in parallel with the second capacitor, and a second inverter coupled back-to-back to the first inverter. The DCO further includes a digital-to-analog-converter (DAC) to vary a capacitance of the first capacitor.

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Patent Owner(s)

Patent OwnerAddress
SILICON LABORATORIES INCAUSTIN TX

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Khoury, John M Austin, US 66 633

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