Current operative analog to digital converter (ADC)

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United States of America Patent

PATENT NO 11863197
APP PUB NO 20230179213A1
SERIAL NO

18092959

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Abstract

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An analog to digital converter (ADC) senses an analog signal (e.g., a load current) to generate a digital signal. The ADC operates based on a load voltage produced based on charging of an element (e.g., a capacitor) by a load current and a digital to analog converter (DAC) output current (e.g., from a N-bit DAC). The ADC generates a digital output signal representative of a difference between the load voltage and a reference voltage. This digital output signal is used directly, or after digital signal processing, to operate an N-bit DAC to generate a DAC output current that tracks the load current. The digital output signal provided to the N-bit DAC is an inverse function of the load current. The ADC is operative to sense very low currents (e.g., currents as low as is of pico-amps) and consume very little power (e.g., less than 2 μW).

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Patent Owner(s)

  • SIGMASENSE, LLC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huynh, Phuong Fairfax, US 73 161

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