Back to results
US 12,747,982 B2Granted
Optical sensor
AssigneeLite-On Singapore Pte. Ltd.
InventorsYoshio Nishida, Seng-Yee Chua
Life of this patent
Estimating the term…
Abstract
An optical sensor is provided. The optical sensor includes a photodiode and a differential current integrator. The differential current integrator includes a first input terminal, a second input terminal, a first output terminal and a second output terminal. The first input terminal of the differential current integrator is connected to the photodiode. The second input terminal of the differential current integrator is coupled to a first reference voltage.
Claims19
An optical sensor, comprising:
- a photodiode;
- a differential current integrator including a first input terminal, a second input terminal, a first output terminal and a second output terminal, wherein the first input terminal of the differential current integrator is connected to the photodiode, and the second input terminal of the differential current integrator is coupled to a first reference voltage;
- a first input current source, wherein a first terminal of the first input current source is coupled to a common voltage;
- and
- a first power switch, wherein a first terminal of the first power switch is connected to a second terminal of the first input current source, and a second terminal of the first power switch is connected to the first input terminal of the differential current integrator.
2 more elements
An optical sensor, comprising:
- a photodiode;
- a differential current integrator including a first input terminal, a second input terminal, a first output terminal and a second output terminal, wherein the first input terminal of the differential current integrator is connected to the photodiode, and the second input terminal of the differential current integrator is coupled to a first reference voltage;
- and
- a first voltage comparator, wherein a first input terminal of the first voltage comparator is connected to the second output terminal of the differential current integrator, a second input terminal of the first voltage comparator is connected to the first output terminal of the differential current integrator, a third input terminal of the first voltage comparator is coupled to a second reference voltage, and a fourth input terminal of the first voltage comparator is coupled to a third reference voltage.
1 more element
An optical sensor, comprising:
- a photodiode;
- a differential current integrator including a first input terminal, a second input terminal, a first output terminal and a second output terminal, wherein the first input terminal of the differential current integrator is connected to the photodiode, and the second input terminal of the differential current integrator is coupled to a first reference voltage;
- a first current source connected to the differential current integrator;
- a first switch connected between the first current source and the second input terminal of the differential current integrator;
- and
- a second switch connected between the first reference voltage and the first input terminal of the differential current integrator.
3 more elements
Dependencies are inferred from the claim text.