发明名称 |
AN INSTRUMENT FOR MEASURING ELECTRICAL RESISTANCE, INDUCTANCE OR CAPACITANCE |
摘要 |
An instrument for measuring electrical resistance or reactance comprises a sine wave generator which generates an a.c. signal and reference signals for a phase sensitive detector. The a.c. signal is applied to a decade attenuator which adjusts its amplitude in dependence on a range switching. The signal is passed to a bridge section, wherein it is applied to a component to measure the value thereof. A voltage output, indicative of the value, is fed to a gain block, wherein its amplitude is re-adjusted in dependence on an input from the range switching. The voltage output is operated on by a phase sensitive detector and passes to a digital display. In the reactance mode, set by a function switching, the a.c. signal is phase shifted before being applied to the component, so that the voltage output is in phase with the reference signals. |
申请公布号 |
DE3364171(D1) |
申请公布日期 |
1986.07.24 |
申请号 |
DE19833364171 |
申请日期 |
1983.05.10 |
申请人 |
THORN EMI INSTRUMENTS LIMITED |
发明人 |
TEDD, DAVID CLIFFORD;WILLIAMS, JOHN BLENHEIM |
分类号 |
G01R27/02;G01R27/26;(IPC1-7):G01R27/02 |
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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