发明名称 |
CAPACITANCE-TO-DIGITAL INTERFACE CIRCUIT FOR DIFFERENTIAL PRESSURE SENSOR |
摘要 |
A two phase, second order capacitance-to-digital (CD) modulator includes a first stage sigma-delta integrator that forms charge packets as a function of sensor capacitance during an auto-zero phase and integrates the packets during an integration phase to produce an output voltage. The first stage integrator holds its output voltage during the auto-zero phase, so that a second stage sigma-delta integrator can sample the first stage output voltage during the auto-zero phase and integrate the sampled voltage during the integration phase. |
申请公布号 |
WO2007089640(A3) |
申请公布日期 |
2009.05.07 |
申请号 |
WO2007US02262 |
申请日期 |
2007.01.26 |
申请人 |
FISHER-ROSEMOUNT SYSTEMS, INC.;WANG, RONGTAI |
发明人 |
WANG, RONGTAI |
分类号 |
H03M3/00 |
主分类号 |
H03M3/00 |
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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