发明名称 |
Phase compensation for multi-stimulus controller |
摘要 |
Determining a compensated phase matrix for a multi-stimulus demodulation process is provided. A first drive line of a multi-stimulus sensing system is selected, and a stimulation signal is transmitted on the selected drive line. A channel gain resulting from the stimulation signal is measured from a received sense signal resulting from the stimulation signal. The measured channel gain is compared with a known channel gain to obtain an individual phase compensation for the selected drive line. A compensated phase matrix is formed of the individual phase compensation values for multiple drive lines. |
申请公布号 |
US9086750(B2) |
申请公布日期 |
2015.07.21 |
申请号 |
US201414315162 |
申请日期 |
2014.06.25 |
申请人 |
Apple Inc. |
发明人 |
Krah Christoph H. |
分类号 |
G06F3/041;G06F3/044 |
主分类号 |
G06F3/041 |
代理机构 |
Morrison & Foerster LLP |
代理人 |
Morrison & Foerster LLP |
主权项 |
1. A method comprising:
measuring phase characteristics of a plurality of transmit channels and sense channels of a multi-stimulus sensing system; calculating a phase delay to apply to composite sense signals received by a sense channel based on the measured phase characteristics; and calculating phase compensation values to apply to component signals of the composite sense signals received by the sense channel based on the phase characteristics and the phase delay. |
地址 |
Cupertino CA US |