发明名称 |
CAPACITIVE TOUCH SENSE ARCHITECTURE |
摘要 |
An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform.
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申请公布号 |
US2013162586(A1) |
申请公布日期 |
2013.06.27 |
申请号 |
US201213403873 |
申请日期 |
2012.02.23 |
申请人 |
ERDOGAN OZAN E.;SHEN GUOZHONG;ANANTHARAMAN RAJESH;TAPARIA AJAY;JAVID BEHROOZ;MAHMUD SYED T.;CHOWDHURY RAHIM;MAXIM INTEGRATED PRODUCTS, INC. |
发明人 |
ERDOGAN OZAN E.;SHEN GUOZHONG;ANANTHARAMAN RAJESH;TAPARIA AJAY;JAVID BEHROOZ;MAHMUD SYED T.;CHOWDHURY RAHIM |
分类号 |
G01R27/26;G06F3/044 |
主分类号 |
G01R27/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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