Touch sensing unit and display device including the same
US-12164734-B2 · Dec 10, 2024 · US
Circuit and method for sensing a capacitance
US9075486B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9075486-B2 |
| Application number | US-201113316273-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 9, 2011 |
| Priority date | Dec 10, 2010 |
| Publication date | Jul 7, 2015 |
| Grant date | Jul 7, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A transconductance amplifier mirror circuit is connected to an electrode for sensing the capacitance of the electrode with reference to ground, or the capacitance between the electrode and another electrode. A voltage level change is produced on the electrode connected to the transconductance amplifier mirror circuit to cause the transconductance amplifier mirror circuit to supply charges to or drain charges from a charge calculation circuit. The charge amount variation is converted to a signal for calculating the sensed capacitance.
First claim
Opening claim text (preview).
What is claimed is: 1. A circuit for sensing a capacitance between a first electrode and a second electrode, comprising: a switching circuit connected to the first electrode, controlled to change a voltage level of the first electrode; a transconductance amplifier mirror circuit including a first output port and a second output port, the first output port being controlled to connect to the second electrode, the transconductance amplifier mirror circuit being operative to maintai…
Assignees
Inventors
Classifications
Physics · mapped topic
- G06F3/044Primary
Physics · mapped topic
- G01R27/2605Primary
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9075486B2 cover?
- A transconductance amplifier mirror circuit is connected to an electrode for sensing the capacitance of the electrode with reference to ground, or the capacitance between the electrode and another electrode. A voltage level change is produced on the electrode connected to the transconductance amplifier mirror circuit to cause the transconductance amplifier mirror circuit to supply charges to or…
- Who is the assignee on this patent?
- Huang Chun-Chung, Lee I-Shu, Hsu Shih-Yuan, and 2 more
- 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 Tue Jul 07 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).