Ambient light sensor circuits with a delta-sigma analog to digital converter with a switch network

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United States of America Patent

PATENT NO 11852525
APP PUB NO 20220393697A1
SERIAL NO

17774854

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Abstract

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An ambient light sensor is provided that includes a sensor input having a delta-sigma analogue to digital converter. The delta-sigma analogue to digital converter includes a switched capacitor, a common mode voltage source, a reference voltage source, and a switch network. In a first clock phase, the switch network connects the switched capacitor to charge it to either a sum or difference voltage. In a second clock phase, the switch network connects the switched capacitor to transfer charge into a summing junction. A controller controls the switch network in response to a comparator output to connect the switched capacitor to either the common mode voltage or the reference voltage while in the first clock phase.

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Patent Owner(s)

Patent OwnerAddress
AMS INTERNATIONAL AG8645 JONA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Adusumalli, Ravi Kumar Eindhoven, NL 18 16
Avalur, Gowri Krishna Kanth Eindhoven, NL 3 1
Singamala, Sudhakar Eindhoven, NL 6 38
Thottathil, Rahul Eindhoven, NL 7 4

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