Testing of on-chip analog-mixed signal circuits using on-chip memory

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United States of America Patent

PATENT NO 11961577
APP PUB NO 20240013848A1
SERIAL NO

17810671

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Abstract

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Analog-to-digital converters (ADCs) of an integrated circuit includes a first set of ADCs and second set of ADCs in which the ADCs of the first set are of a different type than the ADCs of the second set. On-chip testing of the ADCs includes calibrating an N-bit differential digital-to-analog converter (DAC) and storing a pair of calibration codes for each of 2N possible DAC input codes for the DAC in an on-chip memory. The first set of ADCs is tested using the pairs of calibration codes stored in the on-chip memory and a full N-bit resolution of the DAC. Subsequently, the second set of ADCs is tested using pairs of calibration codes corresponding to a reduced M-bit resolution of the DAC, in which M is less than N. During the testing of the second set of ADCs, a portion of the calibration codes stored in the on-chip memory is overwritten.

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Patent Owner(s)

Patent OwnerAddress
NXP USA INC6501 W WILLIAM CANNON DRIVE TX 30 OE 62 AUSTIN TX 78735

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Abhishek, Kumar Bee Cave, US 77 261
Jin, Xiankun Austin, US 17 58
Lehmann, Mark Munich, DE 4 25

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