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US 2024/0356506 A1Published application
Analog front-end circuit and touch-sensing circuit
AssigneeKunshan Yunyinggu Electronic Technology Co., Ltd.
InventorsKusuma Adi Ningrat, Hanif Fakhruddin
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Abstract
An analog front-end circuit includes a reference voltage source, a first capacitor, an amplifier, and a second capacitor. The first capacitor is coupled to the reference voltage source through a switch. The amplifier includes a first input end receiving a touch sensing signal from a touch sensor, a second input end receiving a reference signal from the first capacitor, and an output end outputting an output signal. The second capacitor is disposed between the first input end and the second input end.
Claims20
An analog front-end circuit, comprising:
- a reference voltage source;
- a first capacitor coupled to the reference voltage source through a switch;
- an amplifier, comprising:
- a first input end receiving a touch sensing signal from a touch sensor;
- a second input end receiving a reference signal from the first capacitor;
- and
- an output end outputting an output signal;
- and
- a second capacitor disposed between the first input end and the second input end.
6 more elements
A touch sensing circuit, comprising:
- an analog front-end circuit, comprising:
- a reference voltage source;
- a first capacitor coupled to the reference voltage source through a switch;
- an amplifier, comprising:
- a first input end receiving a touch sensing signal from a touch sensor;
- a second input end receiving a reference signal from the first capacitor;
- and
- an output end outputting an output signal;
- and
- a second capacitor disposed between the first input end and the second input end;
- and
- an integrator circuit, comprising:
- a first integrator input end coupled to the output end of the amplifier;
- a second integrator input end coupled to the reference voltage source;
- and
- an integrator output end.
13 more elements
Dependencies are inferred from the claim text.