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1. 发明授权

US06836081B2 LED driver circuit and method 有权
标题翻译： LED驱动电路及方法
公开(公告)号：US06836081B2
公开(公告)日：2004-12-28
申请号：US09999157
申请日：2001-10-31
申请人： David F. Swanson , James W. Stewart , Michael K. Lam , Marcello Criscione
发明人： David F. Swanson , James W. Stewart , Michael K. Lam , Marcello Criscione
IPC分类号： H05B3702
CPC分类号： H05B33/0827 , H05B33/0815 , H05B33/0845 , H05B33/0854
摘要： An LED driver circuit and method are disclosed where a plurality of arrays of light emitting diodes each have a transistor connected to each respective array of light emitting diodes. A PWM controller has an input for receiving a voltage reference and an output connected to selected transistors for driving the selected transistors and setting a PWM duty cycle for the selected arrays of light emitting diodes to determine the brightness of selected light emitting diodes. An oscillator is connected to the PWM controller for driving the PWM controller.
摘要翻译：公开了一种LED驱动器电路和方法，其中多个发光二极管阵列各自具有连接到每个相应的发光二极管阵列的晶体管。 PWM控制器具有用于接收电压基准的输入端和连接到所选择的晶体管的输出端，用于驱动所选择的晶体管，并为选定的发光二极管阵列设定PWM占空比，以确定所选择的发光二极管的亮度。振荡器连接到PWM控制器，用于驱动PWM控制器。

2. 发明授权

US06362578B1 LED driver circuit and method 有权
标题翻译： LED驱动电路及方法
公开(公告)号：US06362578B1
公开(公告)日：2002-03-26
申请号：US09470900
申请日：1999-12-23
申请人： David F. Swanson , Marcello Criscione
发明人： David F. Swanson , Marcello Criscione
IPC分类号： H05B3702
CPC分类号： H05B33/0827 , H05B33/0815 , H05B33/0845 , H05B33/0854
摘要： An LED driver circuit and method are disclosed where an array of light emitting diodes have a transistor connected to each respective array of light emitting diodes. A PWM controller has an input for receiving a voltage reference and an output connected to selected transistors for driving selected transistors and setting a PWM duty cycle for the selected arrays of light emitting diodes to determine the brightness of selected light emitting diodes. An oscillator is connected to the PWM controller for driving the PWM controller.
摘要翻译：公开了一种LED驱动器电路和方法，其中发光二极管阵列具有连接到每个相应的发光二极管阵列的晶体管。 PWM控制器具有用于接收电压基准的输入和连接到所选择的晶体管的输出，用于驱动所选择的晶体管，并为所选择的发光二极管阵列设置PWM占空比以确定所选择的发光二极管的亮度。振荡器连接到PWM控制器，用于驱动PWM控制器。

3. 发明授权

US5866797A Liquid level gauge interface system having dynamic offset 失效
标题翻译：液位计接口系统具有动态偏置
公开(公告)号：US5866797A
公开(公告)日：1999-02-02
申请号：US775643
申请日：1996-12-31
申请人： David F. Swanson
发明人： David F. Swanson
IPC分类号： G01F23/00 , G01C17/38
CPC分类号： G01F23/0076 , G01F23/0069
摘要： A liquid level sensor unit outputs a voltage value which corresponding to a measured liquid level to an improved anti-slosh circuit that provides a fast timing rate during the initial condition of the circuit and a slow timing rate during the normal operation of the circuit. The improved anti-slosh circuit further includes a low liquid level warning circuit and a power-on-reset circuit. The system timing rate can be externally controlled by connecting an RC circuit to the improved anti-slosh circuit. Customer defined reference level for low liquid warning is also possible. The entire circuit is included on a single, monolithic integrated circuit. An input pin receives the signal from the fuel tank. An output pin drives a liquid level gauge.
摘要翻译：液位传感器单元将对应于测量液位的电压值输出到在电路的初始状态期间提供快速定时速率的改进的防晃动电路，以及在电路的正常操作期间的慢定时速率。改进的防晃动电路还包括低液位警告电路和上电复位电路。通过将RC电路连接到改进的防晃动电路，可以外部控制系统定时速率。客户定义的低液体警告参考水平也是可以的。整个电路包含在单个单片集成电路中。输入销接收来自燃料箱的信号。输出针驱动液位计。

4. 发明授权

US06426607B1 Programmable system and method for regulating an alternator 有权
标题翻译：用于调节交流发电机的可编程系统和方法
公开(公告)号：US06426607B1
公开(公告)日：2002-07-30
申请号：US09434051
申请日：1999-11-04
申请人： Mauro Merlo , David F. Swanson
发明人： Mauro Merlo , David F. Swanson
IPC分类号： H02J704
CPC分类号： H02J7/1453
摘要： A system and method regulates an alternator charging system and includes a memory for storing and regulating voltages used at specific temperatures for the specific alternator charging system requirements of an alternator. A circuit generates a digital signal indicative of both temperature of a battery supplied by the alternator charging system and the charging system voltage. A digital comparator receives the digital signal and compares the digital signal with the regulating voltage stored within the memory for the specific temperature that is indicative of the temperature of the battery supplied by the alternator charging system to generate a regulator control signal.
摘要翻译：系统和方法调节交流发电机充电系统，并且包括用于存储和调节在特定温度下用于交流发电机的特定交流发电机充电系统要求的电压的存储器。电路产生指示由交流发电机充电系统提供的电池的温度和充电系统电压的数字信号。数字比较器接收数字信号，并将数字信号与存储在存储器内的调节电压比较，该特定温度指示由交流发电机充电系统提供的电池的温度以产生调节器控制信号。

5. 发明授权

US06392577B1 System and method for regulating an alternator 有权
标题翻译：用于调节交流发电机的系统和方法
公开(公告)号：US06392577B1
公开(公告)日：2002-05-21
申请号：US09412534
申请日：1999-10-05
申请人： David F. Swanson , Mauro Merlo , Franco Cocetta
发明人： David F. Swanson , Mauro Merlo , Franco Cocetta
IPC分类号： H03M166
CPC分类号： H02P9/30 , H02J7/245 , Y02T10/92
摘要： A system and method regulates an alternator and includes a circuit for digitally generating a sawtooth waveform. An error amplifier circuit generates a divided down and error amplified alternator system voltage. A comparator circuit receives and compares to each other the digitally generated sawtooth waveform and the error amplified alternator system voltage and has an output to produce an alternator field input signal used for driving the field of an alternator.
摘要翻译：系统和方法调节交流发电机并且包括用于数字产生锯齿波形的电路。误差放大器电路产生分压和误差放大的交流发电机系统电压。比较器电路接收并比较数字产生的锯齿波形和误差放大的交流发电机系统电压，并具有产生用于驱动交流发电机的场的交流发电机场输入信号的输出。

6. 发明授权

US07072778B2 Method and system for determining a rotor position in a wound field DC motor 有权
标题翻译：用于确定伤口直流电机中的转子位置的方法和系统
公开(公告)号：US07072778B2
公开(公告)日：2006-07-04
申请号：US10870252
申请日：2004-06-17
申请人： David F. Swanson
发明人： David F. Swanson
IPC分类号： G01R25/00
CPC分类号： H02P6/185
摘要： A method for determining a rotor position in a DC motor having a plurality of windings, including a rotor winding and a plurality of stator windings begins with producing a changing current flow in a pulsed winding to induce a response signal in other windings of the motor. The pulsed winding may be the rotor winding or selected ones of the stator windings. If the pulsed winding is the rotor winding, response signals induced in at least two of the stator windings are analyzed compute the rotor position. If the pulsed winding is the stator winding, response signals induced from pulsing at least two stator windings are sensed in the rotor winding and analyzed compute the rotor position. A system for computing a rotor position may include comparators for comparing induced response signals in stator windings.
摘要翻译：一种用于确定具有多个绕组的DC电动机中的转子位置的方法，包括转子绕组和多个定子绕组，其开始于在脉冲绕组中产生变化的电流以在电机的其它绕组中引起响应信号。脉冲绕组可以是转子绕组或选定的定子绕组。如果脉冲绕组是转子绕组，则分析在至少两个定子绕组中感应的响应信号来计算转子位置。如果脉冲绕组是定子绕组，则在转子绕组中检测到从至少两个定子绕组脉冲引起的响应信号，并分析计算转子位置。用于计算转子位置的系统可以包括用于比较定子绕组中的感应响应信号的比较器。

7. 发明授权

US5887479A Liquid-level gauge driver circuit 失效
标题翻译：液位计驱动电路
公开(公告)号：US5887479A
公开(公告)日：1999-03-30
申请号：US775642
申请日：1996-12-31
申请人： David F. Swanson
发明人： David F. Swanson
IPC分类号： G01F23/00
CPC分类号： G01F23/0076 , G01F23/0069
摘要： A liquid level sensor unit outputs a voltage value, which corresponds to a measured liquid level, to an anti-slosh circuit that provides a fast timing rate during the initial condition of the circuit and a slow timing rate during the normal operation of the circuit. The anti-slosh circuit further includes a low liquid level warning circuit and a power-on-reset circuit. The system timing rate can be externally controlled by connecting an RC circuit to the improved anti-slosh circuit. A customer defined reference level for low liquid warning is also possible. The entire circuit is included on a single, monolithic integrated circuit. An input pin receives the signal from the fuel tank. An output pin drives a liquid level gauge.
摘要翻译：液位传感器单元将对应于测量液位的电压值输出到在电路的初始状态期间提供快速定时速率的抗锁定电路，以及在电路的正常操作期间的慢定时速率。防晃动电路还包括低液位警告电路和上电复位电路。通过将RC电路连接到改进的防晃动电路，可以外部控制系统定时速率。客户定义的低液体警告的参考水平也是可以的。整个电路包含在单个单片集成电路中。输入销接收来自燃料箱的信号。输出针驱动液位计。

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