Touch sensing unit and display device including the same
US-12164734-B2 · Dec 10, 2024 · US
Capacitance sensor with sensor capacitance compensation
US2016282994A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016282994-A1 |
| Application number | US-201615086720-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 31, 2016 |
| Priority date | Feb 27, 2008 |
| Publication date | Sep 29, 2016 |
| Grant date | — |
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Abstract
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A capacitance sensing circuit may include a switching circuit configured to generate a sensor current by charging and discharging a capacitive sensor electrode, and a current mirror that generates a mirror current based on the sensor current. Based on the mirror current, a measurement circuit generates an output signal representative of a capacitance of the capacitive sensor electrode.
First claim
Opening claim text (preview).
What is claimed is: 1 . An integrated circuit (IC) comprising: a terminal configured to be coupled to a capacitive sensor element; a switching circuit coupled between the terminal and a compensation circuit; a current mirror having an input coupled to the switching circuit and the compensation circuit, and an output coupled to a first input of a comparator; and wherein the switching circuit is configured to couple the terminal to a first supply voltage in a first state and…
Assignees
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Classifications
- G06F3/044Primary
Physics · mapped topic
- G06F3/0416Primary
Physics · mapped topic
- G06F3/04182Primary
Physics · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US2016282994A1 cover?
- A capacitance sensing circuit may include a switching circuit configured to generate a sensor current by charging and discharging a capacitive sensor electrode, and a current mirror that generates a mirror current based on the sensor current. Based on the mirror current, a measurement circuit generates an output signal representative of a capacitance of the capacitive sensor electrode.
- Who is the assignee on this patent?
- Cypress Semiconductor Corp
- What technology area does this patent fall under?
- Primary CPC classification G06F3/044. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Sep 29 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).