发明名称 |
METHOD AND APPARATUS FOR IN-CIRCUIT IMPEDANCE MEASUREMENT |
摘要 |
A device (10) for measuring an impedance (Z>2<) between first and second nodes (22, 24) in an electrical circuit (18) without removing components includes at least one current source (62 and/or 66) to provide first and second currents or current signals (i>0<, i>1<) of known values. First and second probes (30, 34) contact the respective first and second nodes to apply the first and second currents. A third common probe (46) contacts the circuit at a common node (50) that experiences the same current flow as between the first and second nodes. At least one voltage meter (70 and/or 74) measures voltages (V>00<, V>01<, V>11< and V>10<) corresponding to the first and second currents. A processor (100) calculates the impedance based on the known values of the currents, and the measured values of the voltages. |
申请公布号 |
WO03052429(A2) |
申请公布日期 |
2003.06.26 |
申请号 |
WO2002US40424 |
申请日期 |
2002.12.17 |
申请人 |
SIGNUS, INC. |
发明人 |
DAVIS, LARRY, J.;COX, KENNETH, M. |
分类号 |
G01R27/02;G01R27/16;G01R31/27;G01R31/28 |
主分类号 |
G01R27/02 |
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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