发明名称 |
AMPLIFIER CIRCUITS AND METHODS |
摘要 |
A chopper amplifier circuit for sensing Hall voltage with reduced offsets includes a Hall sampling circuit with a first switching circuit for selectively coupling each of four nodes of a Hall plate to either a power source or a ground terminal. The circuit also includes a differential amplifier and a second switching circuit configured for selectively coupling each of the four nodes to inputs of the differential amplifier. A Hall voltage signal retaining circuit includes two groups of four storage devices and a second group of four storage devices. A third switching circuit is configured for outputs of the differential amplifier to selected ones of the storage devices. A fourth switching circuit is configured for selectively coupling the storage devices outputs of the chopper amplifier circuit. |
申请公布号 |
US2014028286(A1) |
申请公布日期 |
2014.01.30 |
申请号 |
US201213711571 |
申请日期 |
2012.12.11 |
申请人 |
HU JINXI;WANG JIABIN;HUANG XUJIANG;BCD SEMICONDUCTOR MANUFACTURING LIMITED |
发明人 |
HU JINXI;WANG JIABIN;HUANG XUJIANG |
分类号 |
G01R15/20 |
主分类号 |
G01R15/20 |
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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