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11.发明授权EBL having a feedback circuit and a method for ensuring low temperature lamp operation at low dimming levels 失效EBL具有反馈电路和用于在低调光水平下确保低温灯操作的方法
公开(公告)号：US5850127A
公开(公告)日：1998-12-15
申请号：US644094
申请日：1996-05-10
IPC分类号： H05B41/298 , H05B41/392 , H05B37/02
CPC分类号： H05B41/3921 , H05B41/2988 , Y10S315/04
摘要： A dimming ballast lamp includes a lamp, a ballast circuit for converting AC input power to AC output power, a dimming interface circuit for generating a dimming control signal having a voltage level indicative of a selected dimming level of the lamp and a dimming circuit responsive to the dimming control signal for controlling operation of the ballast circuit. A feedback control circuit detects the lamp voltage and produces a feedback control signal in response to the lamp voltage exceeding a perscribed threshold voltage level. The dimming circuit, responsive to the feedback control signal, controls operation of the ballast circuit so as to increase lamp current thereby increasing the dimming level of the lamp, ensuring low temperature ignition of the lamp and protecting against lamp shutdown.
摘要翻译： 调光镇流器灯包括灯，用于将AC输入功率转换为AC输出功率的镇流器电路;调光接口电路，用于产生具有指示灯的选定调光电平的电压电平的调光控制信号，以及响应于 用于控制镇流器电路的操作的调光控制信号。 反馈控制电路检测灯电压并且响应于灯电压超过被摄阈值电压电平而产生反馈控制信号。 调光电路响应于反馈控制信号，控制镇流器电路的运行，从而增加灯电流，从而增加灯的调光电平，确保灯的低温点火并防止灯关闭。
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公开(公告)号：US20060097666A1
公开(公告)日：2006-05-11
申请号：US10537008
申请日：2003-11-18
CPC分类号： H05B41/2985 , H05B41/2858 , H05B41/2988
摘要： A striation correction circuit 300 is arranged to apply a first striation correction current to the first fluorescent lamp L1 and a second striation correction current to the second fluorescent lamp L2. A first voltage appearing across the first fluorescent tube L1 due to the first striation correction current is substantially similar in magnitude but has inverted polarity with respect to a second voltage across the second fluorescent tube L2 due to the second striation correction current. Detection of an end-of-life condition of a fluorescent lamp is facilitated.
摘要翻译： 条纹校正电路300被布置成将第一条纹校正电流施加到第一荧光灯L 1，并且向第二荧光灯L 2施加第二条纹校正电流。 由于第一条纹校正电流，出现在第一荧光管L 1上的第一电压在幅度上基本相似，但由于第二条纹校正电流而相对于第二荧光管L 2上的第二电压具有反相极性。 荧光灯的寿命终止状态的检测变得容易。
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公开(公告)号：US5519313A
公开(公告)日：1996-05-21
申请号：US43418
申请日：1993-04-06
CPC分类号： G05F3/267 , Y10S323/907
摘要： A temperature-compensated voltage regulator includes a field effect transistor voltage buffer which receives a high-voltage input and provides a low-voltage output, and a voltage generator having a series connection of a zener diode and at least one p-n junction diode for generating a reference voltage. The voltage generator is coupled between the low-voltage output of the voltage buffer and the input of a current mirror, with the output of the current mirror being coupled to the gate electrode of the field effect transistor in the voltage buffer. Additionally, the output of the current mirror is coupled to the low-voltage output of the voltage buffer by a resistor. The resulting voltage regulator circuit features high performance in a simple, economical configuration.
摘要翻译： 温度补偿电压调节器包括接收高电压输入并提供低电压输出的场效应晶体管电压缓冲器，以及具有齐纳二极管和至少一个pn结二极管的串联连接的电压发生器，用于产生 参考电压。 电压发生器耦合在电压缓冲器的低电压输出和电流镜的输入之间，电流镜的输出与电压缓冲器中的场效应晶体管的栅电极耦合。 此外，电流镜的输出通过电阻耦合到电压缓冲器的低电压输出。 所得到的稳压电路在简单，经济的配置中具有高性能。
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公开(公告)号：US5272392A
公开(公告)日：1993-12-21
申请号：US987892
申请日：1992-12-04
CPC分类号： H03K17/063 , H03K17/0822 , H03K17/145
摘要： A current limit circuit for protection of an intelligent power switch includes a series circuit of a sense transistor and a sense resistor coupled to the power semiconductor transistor switch so that the sense resistor current is a fraction of, and is proportional to, the power transistor current. A pull-down transistor is coupled to the control electrode of the power transistor switch. A feedback circuit including a series connection of a diode-connected transistor and a reference V source is coupled between the sense resistor and the control electrode of the pull down transistor. The feedback circuit produces a voltage level shift and the circuit provides an accurate limit on the power transistor current independent of any variations in threshold voltage.
摘要翻译： 用于保护智能功率开关的电流限制电路包括感测晶体管和耦合到功率半导体晶体管开关的检测电阻器的串联电路，使得检测电阻器电流是功率晶体管电流的一部分，并且与功率晶体管电流成比例 。 下拉晶体管耦合到功率晶体管开关的控制电极。 包括二极管连接的晶体管和参考V源的串联连接的反馈电路耦合在检测电阻和下拉晶体管的控制电极之间。 反馈电路产生电压电平偏移，并且电路提供功率晶体管电流的精确限制，与阈值电压的任何变化无关。
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公开(公告)号：US06356027B1
公开(公告)日：2002-03-12
申请号：US09306910
申请日：1999-05-07
IPC分类号： H05B3700
CPC分类号： H05B41/2851 , H02H3/023 , H02H3/20 , H02H9/026 , H05B41/3921
摘要： A 0-10V dimming interface protection circuit generating an indication that line voltage is applied across first and second leads of the dimming interface controlling light output by a lamp, includes a first device for limiting current serially connected between a line voltage source and the first lead of the dimming interface, a second device connected across the first and second leads for detecting application of line voltage to the dimming interface and for generating a control signal, and a third device for switching, operated in response to the control signal, for causing an increase in resistance of the first device to thereby limit current to the dimmer interface and limit light output by the lamp. According to one aspect of the invention, the protection circuit also includes a fourth device for preventing spurious operation of the second device.
摘要翻译： 0-10V调光接口保护电路，其产生线控电压施加在控制由灯输出的光输出的调光接口的第一和第二引线上的指示，包括用于限制串联连接在线电压源与第一引线之间的电流的第一器件 所述第二设备连接在所述第一和第二引线上，用于检测线路电压施加到调光接口并用于产生控制信号;以及第三设备，用于响应于所述控制信号而被操作， 增加第一装置的电阻，从而限制电流到调光器界面并限制灯的输出。 根据本发明的一个方面，保护电路还包括用于防止第二装置的假操作的第四装置。
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