PULSE WIDTH MODULATION DECODER CIRCUIT, CORRESPONDING DEVICE AND METHODS OF OPERATION
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United States of America Patent
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Issued Date -
Aug 15, 2024
app pub date -
Apr 23, 2024
filing date -
Dec 28, 2020
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Abstract
A circuit for decoding a pulse width modulated (PWM) signal generates an output signal switching between a first and second logic values as a function of a duty-cycle of the PWM signal. Current generating circuitry receives the PWM signal and injects a current to and sinks a current from an intermediate node as a function of the values of the PWM signal. A capacitor coupled to the intermediate node is alternatively charged and discharged by the injected and sunk currents, respectively, to generate a voltage. A comparator circuit coupled to the intermediate node compares the generated voltage to a comparison voltage and drives the logic values of the output signal as a function of the comparison.
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