发明名称 |
Bias control circuit for light-emitting diode having temperature compensation |
摘要 |
A bias control circuit for a light-emitting diode having compensation of the light output at changing temperature, in which the light-emitting diode (led) used as temperature sensor is taken up together with a series resistor (R3) in a series circuit to which a fixed supply voltage is applied. A further series circuit of two resistors (R1, R2) having strongly different values is connected parallel across the series resistor (R3) and a differential amplifier (A1) is provided, the one and the other input of which are connected respectively to the junction of the two resistors (R1, R2) and to a setting voltage (Vi), and the output of which is connected to a control means (Tr1) taken up in series with the one series circuit.
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申请公布号 |
US4529949(A) |
申请公布日期 |
1985.07.16 |
申请号 |
US19830465190 |
申请日期 |
1983.02.08 |
申请人 |
NEDERLANDSE CENTRALE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK |
发明人 |
DE WIT, BENJAMINO;WESSELING, KAREL H. |
分类号 |
H01L33/00;A61B5/024;H04B10/04;H04B10/06;H04B10/14;H05B33/08;H05B37/02;(IPC1-7):H03F3/04 |
主分类号 |
H01L33/00 |
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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