发明授权
- 专利标题： Television receiver including a beam current limiting circuit
- 专利标题（中）： 电视接收机包括一个电流限流电路
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申请号： US608393申请日： 1975-08-27
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公开(公告)号： US4017681A公开(公告)日： 1977-04-12
- 发明人: Wouter Smeulers , Willem Hendrik Amsen
- 申请人： Wouter Smeulers , Willem Hendrik Amsen
- 申请人地址： NY New York
- 专利权人： U.S. Philips Corporation
- 当前专利权人： U.S. Philips Corporation
- 当前专利权人地址： NY New York
- 优先权： NL7411912 19740909
- 主分类号： H04N3/18
- IPC分类号： H04N3/18 ; H04N5/14 ; H04N5/59 ; H04N9/64 ; H04N5/68
摘要：
A circuit measures the beam current of a cathode ray tube and derives a control signal from it to prevent overdriving and defocussing of the CRT. The circuit can measure both peak and average values and has an isolation circuit, such as an emitter follower, to prevent loading of the cathode circuit of the CRT.
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