公开(公告)号：US07166826B1

公开(公告)日：2007-01-23

申请号：US10294469

申请日：2002-11-13

申请人： David Kunst ,  Steven Martinez ,  Robert James Lewandowski ,  Peter Chambers ,  Joseph James Judkins, III ,  Luis Torres ,  Tom Lindsay

发明人： David Kunst ,  Steven Martinez ,  Robert James Lewandowski ,  Peter Chambers ,  Joseph James Judkins, III ,  Luis Torres ,  Tom Lindsay

IPC分类号： H01S3/00 ,  H01S3/13

CPC分类号： H01S5/0683 ,  H01S5/0617 ,  H01S5/06804 ,  H01S5/06808

摘要： An automatic power control system provides a control signal that regulates the output power of at least one laser diode. Coarse adjustment of the control signal is provided by a first means, preferably a digital variable resistor, while fine adjustment and compensation is provided by a second means, preferably by a digital-to-analog converter that receives an input signal proportional to a sensed control system parameter. The control system includes an operational amplifier having a first input coupled to sense output power, and a second input coupled to a DAC to provide finer resolution control. Memory can store system parameter or system parameter variations that can be coupled to the DAC and/or variable resistor to enhance system stability over ambient variations.

摘要翻译： 自动功率控制系统提供调节至少一个激光二极管的输出功率的控制信号。 控制信号的粗调是由第一装置，优选数字可变电阻器提供的，而微调和补偿由第二装置提供，优选地由接收与感测控制成正比的输入信号的数 - 模转换器 系统参数。 控制系统包括运算放大器，其具有耦合以感测输出功率的第一输入，以及耦合到DAC的第二输入以提供更精细的分辨率控制。 存储器可以存储可耦合到DAC和/或可变电阻器的系统参数或系统参数变化，以增强系统在环境变化方面的稳定性。

公开(公告)号：US07370069B2

公开(公告)日：2008-05-06

申请号：US10759786

申请日：2004-01-15

申请人： Peter Chambers ,  Joseph James Judkins, III

发明人： Peter Chambers ,  Joseph James Judkins, III

IPC分类号： G06F15/00

CPC分类号： G06F1/0356

摘要： A device for performing numerical value conversion of a digital input value in a first unit to a second unit being a natural unit includes a look-up table storing an array of coefficients for performing the numerical value conversion. The look-up table is indexed using a first parameter to provide a selected coefficient. An arithmetic logic unit (ALU) is coupled to receive the digital input value and the selected coefficient and perform the numerical value conversion based on a first equation using the selected coefficient to compute a digital output value in the second unit. The first unit can be an arbitrary ADC unit and the second unit is a natural unit of physical measurement, such as volts, amperes, degree Centigrade. Furthermore, the device can be used to perform numerical value conversion from the arbitrary unit to the natural unit having a linear or a non-linear relationship.

摘要翻译： 用于将第一单元中的数字输入值数值转换为作为自然单元的第二单元的设备包括存储执行数值转换的系数阵列的查找表。 使用第一参数来索引查找表以提供所选择的系数。 耦合算术逻辑单元（ALU）以接收数字输入值和所选择的系数，并且使用所选择的系数基于第一等式执行数值转换，以计算第二单元中的数字输出值。 第一个单元可以是任意的ADC单元，第二个单元是物理测量的自然单位，如伏特，安培，摄氏度。 此外，该装置可以用于执行从任意单元到具有线性或非线性关系的自然单元的数值转换。

公开(公告)号：US07395287B2

公开(公告)日：2008-07-01

申请号：US10759988

申请日：2004-01-15

申请人： Peter Chambers ,  Joseph James Judkins, III

发明人： Peter Chambers ,  Joseph James Judkins, III

IPC分类号： G06F15/00

CPC分类号： H03M1/1235 ,  H03M1/129

摘要： A device for performing numerical value conversion of a digital input value in a first unit to a second, natural unit where the digital input value is a digitized value of a first measurement parameter includes a look-up table storing an array of coefficients for performing the numerical value conversion for multiple measurement parameters. The look-up table is indexed using a first parameter indicative of the first measurement parameter to provide a selected coefficient. The device further includes an arithmetic logic unit (ALU) receiving the digital input value and the selected coefficient and performing the numerical value conversion based on a first equation and the selected coefficient to compute a digital output value. The device also includes a saturation-limit circuit coupled to receive the digital output value from the arithmetic logic unit and provide a predetermined output value when the digital output value exceeds a predetermined maximum value.

摘要翻译： 一种用于对第一单元中的数字输入值进行数值转换的装置，其中数字输入值是第一测量参数的数字化值的第二自然单元包括：存储用于执行第一测量参数的系数阵列的查找表; 多个测量参数的数值转换。 使用指示第一测量参数的第一参数来索引查找表以提供所选择的系数。 该装置还包括接收数字输入值和所选系数的算术逻辑单元（ALU），并且基于第一方程和所选择的系数执行数值转换以计算数字输出值。 该装置还包括饱和极限电路，其被耦合以从所述算术逻辑单元接收所述数字输出值，并且当所述数字输出值超过预定最大值时提供预定的输出值。

公开(公告)号：US6054823A

公开(公告)日：2000-04-25

申请号：US81309

申请日：1998-05-19

申请人： Jerry Collings ,  Chuong Nguyen ,  Joseph James Judkins, III ,  Donald E. Alfano ,  Ali Tasdighi ,  Quoi V. Huynh ,  Sang T. Ngo

发明人： Jerry Collings ,  Chuong Nguyen ,  Joseph James Judkins, III ,  Donald E. Alfano ,  Ali Tasdighi ,  Quoi V. Huynh ,  Sang T. Ngo

IPC分类号： F04D27/02 ,  H02H7/093 ,  H01R39/46

CPC分类号： H02H7/093 ,  F04D27/008

摘要： An apparatus for sensing the rotation of a brushless DC fan includes the fan and a sense/driver circuit and a capacitance. The sense/driver circuit is coupled to the fan to receive a sense input signal including a fluctuating electrical effect caused by fan commutation events. The sense/driver circuit processes the sense input signal to generate a sense output signal indicative of fan operation. The sense/driver circuit includes an integrated circuit. The integrated circuit includes a sense input pin, a ground return pin, a driver circuit, an integrated filter portion, a filter pin and a level detecting circuit. The capacitance is coupled to the filter pin to provide a filter with the integrated filter portion. The driver circuit includes a control terminal, a first current handling terminal coupled to the sense input pin and a second current handling terminal coupled to provide a ground return pat. The integrated filter portion includes a filter input coupled to at least one of the first and second current handling terminals of the driver circuit, and a filter output for providing a filter output signal to the level detecting circuit. The level detecting circuit generates the sense output signal from the filter output signal. The filter derives the filter output signal indicative of the fan commutation events responsive to receiving a signal at the sense input pin.

摘要翻译： 用于感测无刷直流风扇的旋转的装置包括风扇和感测/驱动器电路和电容。 感测/驱动器电路耦合到风扇以接收包括由风扇换向事件引起的波动电效应的感测输入信号。 感测/驱动电路处理感测输入信号以产生指示风扇操作的感测输出信号。 感测/驱动电路包括集成电路。 集成电路包括感测输入引脚，接地返回引脚，驱动器电路，集成滤波器部分，滤波器引脚和电平检测电路。 电容耦合到滤波器引脚以提供具有集成滤波器部分的滤波器。 驱动器电路包括控制端子，耦合到感测输入引脚的第一电流处理端子和耦合以提供接地回路的第二电流处理端子。 集成滤波器部分包括耦合到驱动器电路的第一和第二电流处理终端中的至少一个的滤波器输入和用于向电平检测电路提供滤波器输出信号的滤波器输出。 电平检测电路从滤波器输出信号产生感测输出信号。 响应于在感测输入引脚处接收到信号，滤波器导出指示风扇换向事件的滤波器输出信号。

公开(公告)号：US6040668A

公开(公告)日：2000-03-21

申请号：US749864

申请日：1996-11-14

申请人： Quoi V. Huynh ,  Sang T. Ngo ,  Joseph James Judkins, III ,  Donald E. Alfano

发明人： Quoi V. Huynh ,  Sang T. Ngo ,  Joseph James Judkins, III ,  Donald E. Alfano

IPC分类号： G05D23/19 ,  G05B5/00

CPC分类号： G05D23/1912 ,  Y10S388/934

摘要： Disclosed herein is a monolithic fan controller circuit which provides the following features: a special start-up routine for the fan; a fan fault detector; a thermal fault detector; an automatic speed controller; a minimum speed controller; a routine for attempting to clear temporary fan faults; and a controllable drive signal frequency. A start-up control circuit provides an initial high duty-cycle kick to the fan in order to initiate the rotation of the fan. A temperature sensor, which may be external or internal to the monolithic fan controller, supplies a signal which is proportional to measured temperature. This signal is used to control the output pulse width of a pulse-width modulator (PWM) or control the frequency of a pulse frequency modulator (PFM). The PWM or PFM output signal regulates the speed of the brushless (or brush) DC fan motor. In a preferred embodiment, the monolithic fan controller has 8 pins.

摘要翻译： 本文公开了一种单片风扇控制器电路，其提供以下特征：风扇的特殊启动程序; 风扇故障检测器; 热故障检测器; 自动速度控制器; 最小速度控制器 试图清除临时风扇故障的例行程序; 和可控的驱动信号频率。 启动控制电路为风扇提供初始高占空比踢脚，以启动风扇的旋转。 可以在单片风扇控制器外部或内部的温度传感器提供与测量温度成比例的信号。 该信号用于控制脉冲宽度调制器（PWM）的输出脉冲宽度或控制脉冲频率调制器（PFM）的频率。 PWM或PFM输出信号调节无刷（或刷式）直流风扇电机的速度。 在优选实施例中，单片风扇控制器具有8个引脚。

公开(公告)号：US06351601B1

公开(公告)日：2002-02-26

申请号：US09256841

申请日：1999-02-24

申请人： Joseph James Judkins, III

发明人： Joseph James Judkins, III

IPC分类号： H02P5168

CPC分类号： H02P7/285

摘要： A fan speed control system for controlling the operation and speed of a fan is described. The fan speed control system includes a power control block for supplying an output voltage to the fan. An integrated circuit fan controller causes a resistor divider circuit to operably divide a selected portion of the output voltage. The integrated circuit fan controller comprises a data register which receives values indicative of control or speed operands from a host. A logic state machine translates these values into appropriate logic signals and provides the signals to the resistor divider circuit. A timing reference or an oscillator controls the proper sequencing and timing relationship of the logic state machine. To turn the fan on, the following sequence of steps occurs. The power control block is turned off causing the output voltage not to be supplied to the fan. The logic state machine controls the resistor divider circuit to divide the output voltage to be supplied to the fan. Thereafter, the power control block is enabled to supply the output voltage to the fan. The logic state machine, after an interval, controls the resistor divider circuit to divide up to selected portion of the output voltage to adjust the speed of the fan. To turn the fan off, the power control block is turned off followed by controlling the resistor divider circuit not to be capable of dividing any of the output voltage.

摘要翻译： 描述了用于控制风扇的操作和速度的风扇速度控制系统。 风扇速度控制系统包括用于向风扇提供输出电压的功率控制块。 集成电路风扇控制器使得电阻分压器电路可操作地划分输出电压的选定部分。 集成电路风扇控制器包括数据寄存器，其从主机接收指示控制或速度操作数的值。 逻辑状态机将这些值转换成适当的逻辑信号，并将信号提供给电阻分压器电路。 定时参考或振荡器控制逻辑状态机的正确排序和时序关系。 要打开风扇，将执行以下步骤。 电源控制块被关闭，导致输出电压不被提供给风扇。 逻辑状态机控制电阻分压电路以分配供给风扇的输出电压。 此后，功率控制块被使能以向风扇提供输出电压。 逻辑状态机经过一段时间后，控制电阻分压电路，将其分配到输出电压的选定部分，以调节风扇的转速。 要关闭风扇，电源控制块关闭，然后控制电阻分压器电路不能分压任何输出电压。