| 发明名称 |
PIEZO KEY SENSING CIRCUIT AND METHOD FOR TESTING THE PIEZO KEY SENSING CIRCUIT |
| 摘要 |
A method tests a piezo key sensing circuit having a piezo element and verifies that it is properly functioning. A capacitance of the piezo element is discharged. Then the capacitance of the piezo element is charged during a predetermined time period. An output signal of the piezo element is measured during the predetermined time period resulting in a measured output signal. An operating condition of the piezo key sensing circuit is determined based on the measured output signal. |
| 申请公布号 |
US2015260770(A1) |
申请公布日期 |
2015.09.17 |
| 申请号 |
US201514700359 |
申请日期 |
2015.04.30 |
| 申请人 |
DIEHL AKO STIFTUNG & CO. KG |
发明人 |
DMYTRIW TONY |
| 分类号 |
G01R27/26;G01L1/16 |
主分类号 |
G01R27/26 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for testing a functionality of a piezo key sensing circuit, which comprises the steps of:
discharging a capacitance of a piezo element; charging the capacitance of the piezo element during a predetermined time period; measuring an output signal of the piezo element during the predetermined time period resulting in a measured output signal; and determining an operating condition of the piezo key sensing circuit based on the measured output signal. |
| 地址 |
Wangen DE |
