| 发明名称 |
Noise Measurement in Capacitive Touch Sensors |
| 摘要 |
In particular embodiments, an apparatus includes a charge-measurement capacitor having a first plate coupled to a second plate of a coupling capacitor and a non-transitory computer-readable storage medium embodying logic that is operable when executed to ground a first plate of the coupling capacitor; inject a pre-determined amount of charge onto the charge-measurement capacitor; and transfer an amount of charge accumulated on the second plate of the coupling capacitor to the first plate of the charge-measurement capacitor. The charge accumulated on the second plate of the coupling capacitor is due at least in part to noise. The logic is also operable when executed to determine, through a measured voltage across the charge-measurement capacitor, the amount of charge. |
| 申请公布号 |
US2014300376(A1) |
申请公布日期 |
2014.10.09 |
| 申请号 |
US201414153821 |
申请日期 |
2014.01.13 |
| 申请人 |
Philipp Harald;Pickett Daniel;Yilmaz Esat |
发明人 |
Philipp Harald;Pickett Daniel;Yilmaz Esat |
| 分类号 |
G01R27/26 |
主分类号 |
G01R27/26 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An apparatus comprising:
a charge-measurement capacitor having a first plate coupled to a second plate of a coupling capacitor; and a non-transitory computer-readable storage medium embodying logic that is operable when executed to:
ground a first plate of the coupling capacitor;inject a pre-determined amount of charge onto the charge-measurement capacitor;transfer an amount of charge accumulated on the second plate of the coupling capacitor to the first plate of the charge-measurement capacitor, the charge having accumulated on the second plate of the coupling capacitor due at least in part to noise; anddetermine, through a measured voltage across the charge-measurement capacitor, the amount of charge. |
| 地址 |
Zug CH |
