Temperature sensor with current mode output for th

专利名称：Temperature sensor with current mode

output for thermal protection for a cathoderay tube (CRT) driver

发明人：Hon Kin Chiu申请号：US09948922申请日：20010907公开号：US06512340B1公开日：20030128

专利附图：

摘要：One embodiment of the present invention includes a temperature sensor withcurrent mode output utilized within a cathode ray tube (CRT)-based display system for

providing thermal protection to a CRT driver. Specifically, the current mode outputtemperature sensor of the present embodiment is implemented with the CRT driver ofthe CRT display system. Furthermore, the temperature sensor has a current sink outputthat is connected to an Automatic Brightness Limiter (ABL) circuit of the CRT display. Thecurrent sink of the temperature sensor operates in a manner similar to an “OR gate”with the CRT anode current. As such, when the CRT driver temperature rises above athreshold temperature, the current mode output temperature sensor sinks a current andactivates the ABL circuit. As a result, the video amplitude of the CRT driver is reduced andits temperature is stabilized.

申请人：NATIONAL SEMICONDUCTOR CORPORATION

代理机构：Wagner, Murabito & Hao LLP

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