公开(公告)号：US08461764B2

公开(公告)日：2013-06-11

申请号：US13083618

申请日：2011-04-11

申请人： Arkadiy Peker ,  Dror Korcharz ,  Paul Okada

发明人： Arkadiy Peker ,  Dror Korcharz ,  Paul Okada

IPC分类号： H05B37/00

CPC分类号： H05B33/0818 ,  Y02B20/347

摘要： An LED driver arrangement wherein a low voltage IC is arranged to sample the voltage at a terminal of each of the respective electronically controlled switches controlling a plurality of LED strings each receiving power from a single source, with the single source providing voltage in excess of the voltage rating of the IC. For each electronically controlled switch a controllable current source and an isolating unidirectional electronic valve is provided, the respective current source being enabled only when the respective associated electronically controlled switch is at least partially closed thereby ensuring that the respective isolating unidirectional electronic valve associated with the respective illuminating LED string conducts, and the voltage at the terminal of the respective electronically controlled switch is thus seen by the IC when the associated LED string is producing illumination, the voltage then being lower than the maximum voltage rating of the IC.

摘要翻译： 一种LED驱动器装置，其中低电压IC被布置成对各个电子控制开关的端子处的电压进行采样，每个电子控制开关控制多个LED串，每个LED串从单个源接收电力，单个源提供超过 IC的额定电压。 对于每个电子控制开关，提供了可控电流源和隔离单向电子阀，仅当相应的相关联的电子控制开关至少部分闭合时才允许相应的电流源，从而确保与相应的电子控制开关相关联的相应的隔离单向电子阀 照明LED串导通，并且当相关联的LED串产生照明时，IC看到各个电子控制开关的端子处的电压，然后电压低于IC的最大额定电压。

公开(公告)号：US07906868B2

公开(公告)日：2011-03-15

申请号：US12340717

申请日：2008-12-21

申请人： Bruce Ferguson ,  Paul Okada

发明人： Bruce Ferguson ,  Paul Okada

IPC分类号： H02J3/14

CPC分类号： H02M3/33576 ,  H02M3/3353 ,  H02M3/33561 ,  Y10T307/406

摘要： A secondary side voltage regulation scheme applied to a multiple output flyback converter. The output with the highest error voltage is selected to control the primary switch. The remaining outputs are regulated by varying the length of time that current is allowed to flow into each output by controlling the on time of a switch connected in series with each of the outputs. The switching of the windings is achieved using a single N channel MOSFET for each output. Regulation of the outputs is performed using leading edge modulation. The body diode of the output MOSFET switches are held off during the start of the commutation period by the use of an active clamp on the primary side.

摘要翻译： 二次侧电压调节方案应用于多输出反激式转换器。 选择具有最高误差电压的输出来控制主开关。 通过控制与每个输出串联连接的开关的接通时间来改变允许电流流入每个输出的时间长度来调节剩余的输出。 使用单个N沟道MOSFET为每个输出实现绕组的切换。 使用前沿调制来执行输出的调节。 输出MOSFET开关的体二极管在换向周期的开始期间通过使用初级侧的有源钳位而被关断。

公开(公告)号：US5642244A

公开(公告)日：1997-06-24

申请号：US271866

申请日：1994-07-07

申请人： Paul Okada ,  Tim Jackson ,  Kirby Lam ,  Richard Contreras

发明人： Paul Okada ,  Tim Jackson ,  Kirby Lam ,  Richard Contreras

IPC分类号： G11B19/02 ,  G11B20/10 ,  G11B15/12 ,  G11B5/09

CPC分类号： G11B20/10 ,  G11B19/02 ,  G11B2020/1282

摘要： A servo gate method and apparatus to allow switching between a servo mode and a data mode in the read channel of a disk drive. The present invention uses a servo gate signal to select components and parameters in the read channel of a disk drive. The servo gate signal, when enabled, preloads appropriate registers with new values and preloads the programmable filter with new values. The servo gate signal is not limited to preloading the above values, but may be used to control many characteristics of a disk drive read channel. For example, the servo gate signal may be used to control a pulse detector amplitude voltage threshold, to select between a window comparator and a hysteresis comparator, to control a pulse detector qualification mode for either a window comparator or a hysteresis comparator, to set a hysteresis threshold time constant, to adjust the cut-off frequency and high-frequency boost of a programmable filter, to switch a raw data output, to set an AGC amplifier gain setting, to provide fast recovery from changes in offset or DC operating point changes and to set an AGC amplifier target voltage level. The servo gate signal is designed to override read gate and write gate signals.

摘要翻译： 一种允许在磁盘驱动器的读取通道中的伺服模式和数据模式之间切换的伺服门方法和装置。 本发明使用伺服门信号来选择磁盘驱动器的读通道中的组件和参数。 伺服门信号在使能时用新值预加载适当的寄存器，并用新值预加载可编程滤波器。 伺服门信号不限于预加载上述值，而可用于控制磁盘驱动器读通道的许多特性。 例如，伺服门信号可用于控制脉冲检测器幅度电压阈值，以便在窗口比较器和滞后比较器之间进行选择，以控制窗口比较器或迟滞比较器的脉冲检测器限定模式，以设置 滞后阈值时间常数，调节可编程滤波器的截止频率和高频提升，切换原始数据输出，设置AGC放大器增益设置，以提供从偏移或直流工作点变化的快速恢复 并设置AGC放大器目标电压电平。 伺服门信号被设计为覆盖读门和写门信号。