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    LCD display precharge regulator circuit
    21.
    发明授权
    LCD display precharge regulator circuit 失效
    LCD显示预充电调节电路

    公开(公告)号：US5424673A

    公开(公告)日：1995-06-13

    申请号：US188527

    申请日：1994-01-28

    Applicant: Michael W. Edwards ,  Scott W. Dalton

    Inventor： Michael W. Edwards ,  Scott W. Dalton

    IPC: G09G3/36 ,  H01J19/82

    CPC classification number: G09G3/36

    Abstract: An LCD precharge regulator circuit providing current directly from the input battery voltage to precharge the LCD display. A first switch activates a precharge regulator coupled to the unregulated DC input voltage, to supply the power for the initial current surge from the DC input to charge the LCD display. The precharge regulator includes a transistor and a biasing circuit. The biasing circuit initially turns the transistor fully on, but increasingly biases the transistor off as the LCD display charges to just below the operating voltage of the LCD display. A delay circuit activates a second switch after the LCD display is substantially charged, where the second switch connects the supply voltage from the DC/DC converter to the LCD display. At that point, the transistor is biased off, isolating the LCD display from the DC input voltage. Thus, the supply voltage need only sustain the charge on the LCD display after being substantially charged. Low power series resistors are provided to serve as a fuse, which fail to an open circuit condition, isolating the LCD display from high input voltage levels in the event of excessive current flowing into an overvoltage Zener diode.

    Abstract translation: LCD预充电调节器电路直接从输入电池电压提供电流，以预充电液晶显示器。 第一开关激活耦合到未调节的DC输入电压的预充电调节器，以从DC输入端提供用于初始电流浪涌的功率以对LCD显示器充电。 预充电调节器包括晶体管和偏置电路。 偏置电路最初将晶体管全部导通，但随着LCD显示器充电到刚刚低于LCD显示器的工作电压，晶体管将逐渐偏离晶体管。 在LCD显示器基本上被充电之后，延迟电路激活第二开关，其中第二开关将来自DC / DC转换器的电源电压连接到LCD显示器。 此时，晶体管被偏置，将LCD显示屏与直流输入电压隔离。 因此，在充电之后，电源电压仅需维持LCD显示器上的电荷。 提供低功率串联电阻，作为不能开路的保险丝，在过电流流入过压齐纳二极管的情况下，将LCD显示屏与高输入电压电平隔离。

    Apparatus for synchronously selecting different oscillators as system clock source
    22.
    发明授权
    Apparatus for synchronously selecting different oscillators as system clock source 失效
    用于同步选择不同振荡器作为系统时钟源的装置

    公开(公告)号：US5289138A

    公开(公告)日：1994-02-22

    申请号：US922209

    申请日：1992-07-30

    Applicant: Eugene Wang

    Inventor： Eugene Wang

    IPC: G06F1/08 ,  H04L7/00 ,  H03B27/00 ,  H01J19/82 ,  H04B1/10

    CPC classification number: H04L7/0083 ,  G06F1/08

    Abstract: An apparatus is provided for synchronously selecting different oscillators as the system clock source. The apparatus is comprised of two oscillator selectors. Each of the oscillator selectors has as its inputs the output of each of the oscillators and a three-bit command code which indicates which of the oscillators is to be selected by the oscillator selector and a single clock output. A different oscillator may be selected by each of the oscillator selectors at the same time. The output of the oscillator selectors are inputs to the clock controller. The clock controller also receives command signals for controlling the switching of the clock controller between the outputs of the two oscillator selectors. The output of the clock controller is the clock source for the system and a status signal indicating which oscillator selector is presently being used.

    Abstract translation: 提供了用于同步选择不同振荡器作为系统时钟源的装置。 该装置由两个振荡器选择器组成。 每个振荡器选择器具有作为其输入的每个振荡器的输出和三位指令代码，其指示振荡器选择器和单个时钟输出将选择哪个振荡器。 每个振荡器选择器可以同时选择不同的振荡器。 振荡器选择器的输出是时钟控制器的输入。 时钟控制器还接收用于控制时钟控制器在两个振荡器选择器的输出之间的切换的命令信号。 时钟控制器的输出是系统的时钟源，指示当前正在使用哪个振荡器选择器的状态信号。

    Offset voltage correction circuit for gridded power tubes
    23.
    发明授权
    Offset voltage correction circuit for gridded power tubes 失效
    网格功率管偏移电压校正电路

    公开(公告)号：US4797626A

    公开(公告)日：1989-01-10

    申请号：US902270

    申请日：1986-08-29

    Applicant: Hiroshi Honda ,  Eduardo D. Szyszlican

    Inventor： Hiroshi Honda ,  Eduardo D. Szyszlican

    IPC: H03K5/003 ,  H03K3/02 ,  H01J19/82

    CPC classification number: H03K5/003

    Abstract: An offset voltage correction circuit for a gridded power tube, such as a gridded traveling wave tube (GTWT), provides from a pulsed, floating, negatively offset voltage signal representing the pulsed current output of the tube, a corrected pulsed, zero voltage offset signal. Such corrected signal is used in a feedback loop to control the voltage signal provided to the tube grid in a manner causing the pulsed output current of the tube to have a preestablished amplitude. The signal correcting circuit includes a .pi.-shaped network formed of a capacitor and first and second transistors. The two transistors are connected in electrical parallel so that between pulses of the offset voltage signal the first one of the transistors is held off and keeps the second transistor turned on so that the capacitor charges to the negative offset voltage of the offset voltage signal. During the pulses of the offset voltage signal, the first transistor is turned on and thereby turns the second transistor off, causing the capacitor output side to provide a zero offset voltage pulse having an amplitude equal to the sum of the negative offset and positive voltages (the total peak-to-peak voltage) of the voltage offset signal. The zero offset signal is used by a control loop circuit and a grid pulse modulator to provide a control voltage signal to the grid of the tube which maintains the pulsed output current of the tube at a preselected level in spite of tube aging and thermal effects which tend to cause the output current to change.

    Abstract translation: 用于诸如网格行波管（GTWT）的网格功率管的偏移电压校正电路从表示管的脉冲电流输出的脉冲，浮置，负偏移电压信号提供校正的脉冲零电压偏移信号 。 这种校正信号用于反馈回路中，以使得管的脉冲输出电流具有预先建立的振幅的方式来控制提供给管网的电压信号。 信号校正电路包括由电容器和第一和第二晶体管形成的π形网络。 两个晶体管并联连接，使得在偏移电压信号的脉冲之间，晶体管中的第一个被保持关闭，并且保持第二晶体管导通，使得电容器充电到偏移电压信号的负偏移电压。 在偏移电压信号的脉冲期间，第一晶体管导通，从而使第二晶体管截止，使得电容器输出侧提供具有等于负偏移和正电压之和的振幅的零偏移电压脉冲（ 电压偏移信号的总峰 - 峰电压）。 零偏移信号由控制回路电路和电网脉冲调制器用于向管的栅格提供控制电压信号，其将管的脉冲输出电流保持在预选的水平，尽管管老化和热效应， 倾向于导致输出电流发生变化。

    Transponder for electromagnetic detection system with non-linear circuit
    25.
    发明授权
    Transponder for electromagnetic detection system with non-linear circuit 失效
    用于具有非线性电路的电磁检测系统的应答器

    公开(公告)号：US4572976A

    公开(公告)日：1986-02-25

    申请号：US558579

    申请日：1983-12-06

    Applicant: Tallienco W. H. Fockens

    Inventor： Tallienco W. H. Fockens

    IPC: G05B19/12 ,  G08B13/24 ,  H01J19/82

    CPC classification number: G08B13/2425 ,  G05B19/12 ,  G08B13/2431

    Abstract: A detection wafer with a non-linear circuit for an electromagnetic detection system wherein two different transmission frequencies are used, comprising a resonant circuit connected to a non-linear element forming from the transmission frequencies, a third frequency to be detected. The non-linear element forms part of an amplifying semiconductor circuit connected to a supply battery and having an input circuit coupled to the resonant circuit, and an output circuit comprising a coil magnetically coupled to the coil of the resonant circuit, the resonant frequency bandwidth of the resonant circuit comprising both transmission frequencies and the frequency to be detected.

    Abstract translation: 一种具有用于电磁检测系统的非线性电路的检测晶片，其中使用两个不同的传输频率，包括连接到从传输频率形成的非线性元件的谐振电路，待检测的第三频率。 非线性元件形成连接到电源电池并具有耦合到谐振电路的输入电路的放大半导体电路的一部分，以及输出电路，其包括磁耦合到谐振电路的线圈的线圈，谐振频率带宽 谐振电路包括传输频率和待检测的频率。

    Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
    26.
    发明授权
    Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation 失效
    无电池，便携式，分频器可用作电磁辐射的应答器

    公开(公告)号：US4481428A

    公开(公告)日：1984-11-06

    申请号：US265149

    申请日：1981-05-19

    Applicant: Lincoln H. Charlot, Jr.

    Inventor： Lincoln H. Charlot, Jr.

    IPC: H03B19/14 ,  G01S13/82 ,  G08B13/24 ,  H01J19/82

    CPC classification number: G08B13/242 ,  G08B13/2431

    Abstract: A batteryless, portable, frequency divider including a first LC circuit that is resonant at a first frequency for receiving electromagnetic radiation at the first frequency; a second LC circuit that is resonant at a second frequency that is one-half the first frequency; and a transistor coupling the first and second LC circuits for causing the second LC circuit to transmit electromagnetic radiation at the second frequency in response to the first LC circuit detecting electromagnetic radiation at the first frequency. The first and second LC circuits respectively include inductance coils that are positioned orthogonally to one another so as not to be mutually coupled. The frequency divider is operable solely from unrectified energy at the first frequency provided in the first circuit upon receipt of the electromagnetic radiation at the first frequency detected by the first LC circuit. The frequency divider is useful as an electronic tag for attachment to articles for enabling detection thereof when moved through a surveillance zone containing electromagnetic radiation at the first frequency and thereby is useful in shoplifting detection systems.

    Abstract translation: 一种无电池便携式分频器，包括以第一频率谐振的第一LC电路，用于接收第一频率的电磁辐射; 第二LC电路，其在第一频率的一半的第二频率处谐振; 以及耦合第一和第二LC电路的晶体管，用于响应于第一LC电路检测第一频率的电磁辐射，使第二LC电路以第二频率传输电磁辐射。 第一和第二LC电路分别包括彼此正交定位的电感线圈，以便不相互耦合。 分频器仅在接收到由第一LC电路检测到的第一频率的电磁辐射时，在第一电路中提供的第一频率处的非修正能量可操作。 分频器作为用于附着到物品上的电子标签是有用的，以便在通过包含第一频率的电磁辐射的监视区域时进行检测，从而可用于商店检测系统。

    Electronic power regulation control device for providing constant electrical power to a load of varying impedance
    27.
    发明授权
    Electronic power regulation control device for providing constant electrical power to a load of varying impedance 失效
    用于将恒定电力提供给变化阻力的电子调节控制装置

    公开(公告)号：US3688204A

    公开(公告)日：1972-08-29

    申请号：US3688204D

    申请日：1971-01-26

    Applicant: WESTINGHOUSE ELECTRIC CORP

    Inventor： HRUDA ROBERT M

    IPC: H01J19/82

    CPC classification number: H01J19/82

    Abstract: An electronic power regulation control device for providing constant electric power to a load of varying impedance. The device may be operated to provide degenerative or regenerative regulation with varying load peaks. The device does not require feedback but under certain conditions feedback may enhance the performance. The basic power regulating device is a thermionic electron device wherein the voltage-current characteristic approximates the ideal hyperbolic curve of constant power. This is accomplished by combining the characteristics of a current limiting, temperature limited thermionic diode in conjunction with that of a thermionic triode in a parallel combination. It is also possible to combine the functions of a control diode of high perveance and a control diode of low perveance to also approach a characteristic curve of constant power.

    Abstract translation: 一种用于向变化阻抗的负载提供恒定电力的电子功率调节控制装置。 可以操作该装置以提供具有变化负载峰值的退化或再生调节。 该设备不需要反馈，但在某些情况下，反馈可能会提高性能。 基本功率调节装置是一种热电子器件，其中电压 - 电流特性接近恒定功率的理想双曲线。 这是通过将限流温度限制热离子二极管与热离子三极管的特性并联组合来实现的。 还可以组合高通量的控制二极管和低通量的控制二极管的功能，也可以接近恒定功率的特性曲线。

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