发明名称 |
Schaltungsanordnung zum Liefern eines Gleichstromes |
摘要 |
A description is given of a circuit arrangement for producing a D.C. current, comprising a current-source stage, which is supplied on one input with a measuring current led via an input resistor, and which comprises a current source transistor whose base-emitter path is arranged in parallel with the input resistor and whose collector electrode forms an output of the current-source stage, on which output an output current is offered, a current mirror stage for mirror-inverting the output current of the current-source stage to a working impedance, on which working impedance a control voltage is produced in response to this output current, a current bank having a control input which is supplied with a control voltage, and having at least two outputs simultaneously controlled by the control voltage, on which outputs mutually proportional currents are offered of which a first current forms the measuring current. As a result, a current reference is created which can be used for very low supply voltages, preferably around 0.9 volt, is simple, shows a stable operating behavior and produces a reference current that has a negative temperature coefficient.
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申请公布号 |
DE19609831(A1) |
申请公布日期 |
1997.09.18 |
申请号 |
DE19961009831 |
申请日期 |
1996.03.13 |
申请人 |
PHILIPS PATENTVERWALTUNG GMBH, 22335 HAMBURG, DE |
发明人 |
DICK, BURKHARD, 22455 HAMBURG, DE;WICHERN, ANDREAS, 21073 HAMBURG, DE |
分类号 |
G05F3/26;G05F3/22;H04Q7/06;H04Q7/08;H04Q7/12;(IPC1-7):G05F3/20 |
主分类号 |
G05F3/26 |
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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