发明名称 |
Continuous time correlator 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 an integrated mixing and integration circuit. The correlator includes a programmable impedance element that generates a time-varying conductance according to a controlling digitized waveform. |
申请公布号 |
US8643619(B2) |
申请公布日期 |
2014.02.04 |
申请号 |
US201213404594 |
申请日期 |
2012.02.24 |
申请人 |
ERDOGAN OZAN E.;SHEN GUOZHONG;ANANTHARAMAN RAJESH;TAPARIA AJAY;JAVID BEHROOZ;MAHMUD SYED T.;MAXIM INTEGRATED PRODUCTS, INC. |
发明人 |
ERDOGAN OZAN E.;SHEN GUOZHONG;ANANTHARAMAN RAJESH;TAPARIA AJAY;JAVID BEHROOZ;MAHMUD SYED T. |
分类号 |
G06F3/041 |
主分类号 |
G06F3/041 |
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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