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    • 3. 发明授权
    • Class AB H-bridge using current sensing MOSFETs
    • AB级H桥使用电流检测MOSFET
    • US06445530B1
    • 2002-09-03
    • US09407222
    • 1999-09-24
    • John M. Baker
    • John M. Baker
    • G11B5596
    • G11B5/5526G11B5/022G11B5/59622
    • An apparatus and method for supplying bi-directional load current to a load device. Four current sensing metal oxide semiconductor field effect transistors are operably configured to form an H-bridge with the load device, each transistor having separately insulated gate, source and drain and sense terminals with a source to drain conductivity determined in relation to a voltage applied to the gate terminal and a sense current from the sense terminal determined in relation to a magnitude of source to drain current. Drive voltages are applied to the gate terminals of alternating pairs of the transistors to apply the load current to the load device. The sense currents are used to provide adaptive, closed-loop clamping of the drive voltages at levels sufficient to maintain the non-load current conducting transistors in a quiescent state.
    • 一种用于向负载装置提供双向负载电流的装置和方法。 四个电流感测金属氧化物半导体场效应晶体管可操作地配置为与负载装置形成H桥,每个晶体管具有单独绝缘的栅极,源极和漏极以及感测端子,源极与漏极之间的电导率相对于施加到 栅极端子和来自感测端子的感测电流相对于源极到漏极电流的大小确定。 将驱动电压施加到交替的晶体管对的栅极端子,以将负载电流施加到负载装置。 感测电流用于提供驱动电压的自适应闭环钳位,电平足以将非负载电流导通晶体管保持在静止状态。
    • 4. 发明授权
    • Utility light adjusting and securing device
    • 实用光调节和固定装置
    • US4672515A
    • 1987-06-09
    • US729527
    • 1985-05-01
    • John M. Baker
    • John M. Baker
    • F21L14/02F21V21/096F21V21/14F21L15/18
    • F21V21/145F21L14/02F21V21/0965Y10T24/1486
    • The present invention consists of a device that provides for easy adjustment of the direction of illumination produced by a utility light through a multiplicity of orientations from one attachment position. The device herein uses a metal track attached to the utility light, which track passes through a clamp and wherein the clamp can be releasably attached to various points along the track. Thus, by movement of the clamp along the track, the direction of illumination produced by the utility light can be adjusted. In addition, the device herein includes a magnet connected to the clamp for mounting of the utility light on suitable ferrous-metal support objects. Engagement and disengagement of the clamp from the track is accomplished by rotating the magnet.
    • 本发明包括一种装置,其能够容易地通过多个取向从一个附接位置调整由实用光产生的照明方向。 本文中的装置使用附接到实用灯的金属轨道,该轨道穿过夹具,并且其中夹具可以可释放地附接到沿着轨道的各个点。 因此,通过沿着轨道的夹具的移动,可以调节由实用灯产生的照明方向。 此外,这里的装置包括连接到夹具的磁体,用于将实用光安装在合适的金属 - 金属支撑物体上。 夹具与轨道的接合和脱离通过旋转磁体来实现。
    • 6. 发明授权
    • Adjustable bleed system for a universal solenoid for fluid control valves
    • 用于流体控制阀的通用螺线管的可调放气系统
    • US5204652A
    • 1993-04-20
    • US706347
    • 1991-05-28
    • John M. BakerRonald C. Jess
    • John M. BakerRonald C. Jess
    • F16K31/06H01F7/08H01F7/16
    • F16K31/0651F16K31/0655H01F7/081H01F7/1607
    • A solenoid valve comprising with a plunger which is readily and accurately adjustable to various heights whereby the solenoid is able to function with virtually all fluid flow control systems. The solenoid includes an elongated base which may have multiple threads to accommodate a variety of connectors and a bleed screw formed to be minimally disruptive to the electromagnetic field. A measurement standard, in the form of a cylinder and piston combination, is shaped to fit within the solenoid body and accurately determine the desired length of the specific plunger. The piston is mounted to move in the cylinder and, in conjunction with the cylinder, to assume the exact length required for the plunger within the solenoid to function correctly in operating the valve. The plunger is adjustable which allows the height thereof to be precisely and securely set to the height determined by the measurement standard.
    • 一种电磁阀,包括一个柱塞,该柱塞可以容易且准确地调节到各种高度,由此螺线管能够与几乎所有的流体流动控制系统一起起作用。 螺线管包括细长的基座,其可以具有多个螺纹以适应各种连接器和形成为对电磁场的最小破坏的放气螺钉。 以气缸和活塞组合的形式的测量标准被成形为装配在螺线管体内并精确地确定特定柱塞的期望长度。 活塞被安装成在气缸中移动并且与气缸一起运动以确定螺线管内的柱塞在操作阀时正确地工作。 柱塞是可调节的,其允许其高度被精确且牢固地设定为由测量标准确定的高度。
    • 10. 发明授权
    • Converting a pulse-width modulation signal to an analog voltage
    • 将脉冲宽度调制信号转换为模拟电压
    • US06208280B1
    • 2001-03-27
    • US09326172
    • 1999-06-04
    • John M. BakerEdward N. JeffreyRobert Whyte, Jr.
    • John M. BakerEdward N. JeffreyRobert Whyte, Jr.
    • H03M166
    • H03M1/822
    • An apparatus and method for converting a pulse-width modulation (PWM) signal to an analog voltage signal. A current source is provided to supply electrical charge at a controllable rate to a ramp capacitor which, during successively occurring cycles of the PWM signal, alternatively receives electrical charge from the current source and discharges previously received electrical charge. A first sampling capacitor receives electrical charge from the ramp capacitor to output a feedback voltage to a feedback circuit to adjust the rate of electrical charge supplied by the current source, with the charge transferred to the first sampling capacitor determined in relation to the charge stored on the ramp capacitor over an entire PWM cycle. A second sampling capacitor receives electrical charge from the ramp capacitor to output the analog voltage, with the charge transferred to the second sampling capacitor determined in relation to the duty cycle of the PWM signal.
    • 一种用于将脉冲宽度调制(PWM)信号转换为模拟电压信号的装置和方法。 提供电流源以向可变速率电容器提供电荷,斜坡电容器在连续发生的PWM信号周期期间可替代地从电流源接收电荷并放电先前接收到的电荷。 第一采样电容器从斜坡电容器接收电荷以将反馈电压输出到反馈电路以调整由电流源提供的电荷的速率,其中转移到相对于存储的电荷确定的第一采样电容器的电荷 整个PWM周期内的斜坡电容。 第二采样电容器从斜坡电容器接收电荷以输出模拟电压,其中电荷转移到相对于PWM信号的占空比确定的第二采样电容器。