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专利名称：Electronic electric-energy meter with
automatic offset regulation
发明人：SCHWENDTNER, MANFRED, DIPL.-ING.,STEINMULLER, GUNTER, DIPL.-ING.
申请号：EP84109250.5申请日：19840803公开号：EP0134001A1公开日：19850313
专利附图：
摘要：1. An electronic electricity meter comprising a multiplier (5) whose output isconnected to an integrator (6), and comprising a device for offset correction which
controls a first controllable switch (3) connected in series with an input of the multiplier(5), characterised in that at least one input of the multiplier (5) can be connected toreference potential by the first controllable switch (3) ; that the integration capacitor (6b)of the integrator (6) can be bridged by a second controllable switch (6c) ; that a
controllable compensation device (10, 11) is provided to compensate offset voltages andoffset currents of the multiplier (5) and integrator (6) ; that the output of the integrator(6) is connected to a zero-voltage comparator (14) whose output is connected to thecontrol input of the compensation device (10, 11) ; and that a control unit (13) closes thetwo switches (3, 6c) at specific intervals of time for a period DELTA t, and during thisperiod of time DELTA t the zero-voltage comparator (14) controls the compensationdevice (10, 11) such that the output voltage of the integrator (6) becomes zero.
申请人：SIEMENS AKTIENGESELLSCHAFT
地址：Wittelsbacherplatz 2 80333 München DE
国籍：DE
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