发明名称 |
MIXED-SIGNAL INTEGRATOR ARCHITECTURE |
摘要 |
A mixed signal correlator utilizes coherent detection within a capacitance measurement application. In some applications, the mixed signal correlator is used to measure capacitance of a touch screen display. An external capacitor whose capacitance is measured is kept small for improved sensitivity and can be used for a variety of applications having varied integration periods for measurement. The external capacitor is kept small and can be used for varied applications by adjusting the output voltage within a range that is less than the supply voltage, and maintaining a count of the adjustments to later reconstruct an actual output voltage for the integration period. An output is a weighted sum of an analog integrator output and a digital counter output. |
申请公布号 |
US2012274404(A1) |
申请公布日期 |
2012.11.01 |
申请号 |
US201213404722 |
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 |
H03F1/34 |
主分类号 |
H03F1/34 |
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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