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US 12,196,801 B2Granted
Two-domain two-stage sensing front-end circuits and systems
AssigneeSamsung Display Co., Ltd.
InventorsAli Fazli Yeknami, Younghoon Song
Life of this patent
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Abstract
A circuital system that includes a differential low-pass filter having a differential output and operable in a first voltage domain. Some embodiments include a differential integrator including a differential input and a differential output, and operable in a second voltage domain different from the first voltage domain. Some embodiments include a pair of AC coupling capacitors coupling the differential output of the differential low-pass filter to the differential input of the differential integrator.
Claims20
A circuital system comprising:
- a filter circuit operable in a first voltage domain;
- an integrator circuit operable in a second voltage domain different from the first voltage domain;
- and
- a coupling circuit coupling an output of the filter circuit to an input of the integrator circuit.
1 more element
A sensing circuit comprising:
- a filtering stage operable in a first voltage domain, the filtering stage comprising:
- a first amplifier comprising an input and an output;
- a first feedback circuit coupling a first output electrode of the output of the first amplifier to a first input electrode of the input of the first amplifier;
- and
- a second feedback circuit coupling a second output electrode of the output of the first amplifier to a second input electrode of the input of the first amplifier;
- an integrator stage operable in a second voltage domain, the integrator stage comprising:
- a second amplifier comprising an input and an output;
- a third feedback circuit coupling a first output electrode of the output of the of the second amplifier to a first input electrode of the input of the second amplifier;
- and
- a fourth feedback circuit coupling a second output electrode of the output of the second amplifier to a second input electrode of the input of the second amplifier;
- and
- a coupling circuit coupling the output of the first amplifier to the input of the second amplifier, and configured to electrically isolate the first voltage domain from the second voltage domain.
9 more elements
Dependencies are inferred from the claim text.