| 发明名称 |
Noise suppression and/or reduction circuits and methods for capacitance sensing systems |
| 摘要 |
A capacitance sensing system can include a noise detector coupled to a capacitance sensing network that generates a noise detect signal in response to noise; a delay circuit coupled to generate at least two different delayed sense signals in response to outputs from the capacitance sensing network; and a switch circuit that selectively outputs one of the delayed sense signals in response to the noise detect signal. Particular embodiments can include selectively discarding discrete analog samples of a capacitance signal when noise is detected in such a sample. |
| 申请公布号 |
US8866493(B2) |
申请公布日期 |
2014.10.21 |
| 申请号 |
US201113216556 |
申请日期 |
2011.08.24 |
| 申请人 |
Cypress Semiconductor Corporation |
发明人 |
Kremin Victor;Anderson Erik |
| 分类号 |
G06F3/044;G06F3/041;G01R29/26;G01D5/24 |
主分类号 |
G06F3/044 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A capacitance sensing system, comprising:
a noise detector coupled to a capacitance sensing network that generates a noise detect signal in response to noise; a delay circuit coupled to generate at least two different delayed sense signals in response to outputs from the capacitance sensing network; and a switch circuit that selectively outputs at least one of the delayed sense signals in response to the noise detect signal. |
| 地址 |
San Jose CA US |
