发明名称 |
PHOTODETECTION SYSTEM AND CIRCUIT FOR AMLIFICATION |
摘要 |
<p>A first device comprising a first current mirror is used to amplify the output of a first photodetector. A second device comprising a current mirror arrangement is employed to amplify the output of a second photodetector. The outputs of the two devices are then compared to provide a signal useful for many applications, including that for determining the position of a rotating member or of a member in relative motion to another member. Preferably, no feedback action is used for the amplification of the output of at least one of the photodetectors.</p> |
申请公布号 |
WO2004003481(A1) |
申请公布日期 |
2004.01.08 |
申请号 |
WO2003US02033 |
申请日期 |
2003.01.09 |
申请人 |
CAPELLA MICROSYSTEMS, INC. |
发明人 |
KUO, BRIAN, N.;LAN, ING-JYE;TSANG, KOON, WING;HSU, PEI-LING |
分类号 |
G01D5/347;G01D5/30;G01D5/36;G01J1/44;H01L31/10;H03F3/08;H03F3/343;(IPC1-7):G01D5/34 |
主分类号 |
G01D5/347 |
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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