中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

45 records (took 0.013 seconds)

    Timing circuit
    1.
    发明授权
    Timing circuit 失效
    定时电路

    公开(公告)号：US3943415A

    公开(公告)日：1976-03-09

    申请号：US518707

    申请日：1974-10-29

    Applicant: James P. Minear

    Inventor： James P. Minear

    IPC: H03K3/282 ,  H03K17/28 ,  H03H9/00

    CPC classification number: H03K17/28 ,  H03K3/2828 ,  Y10T307/878

    Abstract: A timing circuit is disclosed which utilizes a principal transistor as a switch to control current flow through a load. The emitter and collector of this principal transistor are connected in a series with a load across DC terminals. Two control transistors are used to regulate when a current is passed by the principal transistor. The base of a first of these control transistors is connected between a resistor and a capacitor in an RC circuit which is connected so as to determine if a current is flowing in the first mentioned series circuit. The base of the other of the transistors is connected to the first mentioned series circuit through a resistor and a capacitor and is grounded through a resistor. As a result of charging of its associated capacitor and of feedback through this capacitor the first control transistor serves to render the principal transistor conductive after it has not conducted a current for a time interval determined by its associated resistor. The second control transistor serves to maintain the principal transistor conductive as its associated capacitor becomes charged and as the charge bleeds off of it.

    Abstract translation: 公开了一种利用主晶体管作为开关来控制通过负载的电流的定时电路。 该主晶体管的发射极和集电极与跨直流端子的负载串联连接。 两个控制晶体管用于调节电流何时通过主晶体管。 这些控制晶体管中的第一个的基极连接在RC电路中的电阻器和电容器之间，RC电路被连接以便确定电流是否在第一个提及的串联电路中流动。 另一个晶体管的基极通过电阻器和电容器连接到首先提到的串联电路，并通过电阻器接地。 作为其相关联的电容器的充电和通过该电容器的反馈的结果，第一控制晶体管用于在其没有通过由其相关联的电阻器确定的时间间隔中传导电流之后使主晶体管导通。 第二控制晶体管用于保持主晶体管导通，因为其相关的电容器被充电并且电荷从其中流出。

    Photo-electric detector with temperature-compensated circuit
    7.
    发明授权
    Photo-electric detector with temperature-compensated circuit 失效
    具有温度补偿电路的光电检测器

    公开(公告)号：US4328419A

    公开(公告)日：1982-05-04

    申请号：US152250

    申请日：1980-05-22

    Applicant: Marcel Lefebvre

    Inventor： Marcel Lefebvre

    IPC: G01V8/12 ,  H03K3/282 ,  H03K17/94 ,  H01J40/14

    CPC classification number: H03K17/941 ,  H03K3/2828

    Abstract: Photo-electric detector comprising a multivibrator with two complementary transistors (T.sub.3 and T.sub.4) of which the base of the first is coupled to the collector of the second by a time constant circuit (R.sub.5 -R.sub.6 -C.sub.1) comprising a resistance (R.sub.5) with negative temperature coefficient. This multivibrator excites an electro-luminescent diode (D.sub.1) which cooperates with a photo-transistor (T.sub.1). After integration, the received signals control a commutator (thyristors Th.sub.1 and Th.sub.2). The circuit is fed by a rectifier bridge with diodes (D.sub.11 to D.sub.14) and formed with two wires.Application to the detection of the presence of an object which blocks the luminous beam emitted by the diode (D.sub.1).

    Abstract translation: 光电检测器包括具有两个互补晶体管（T3和T4）的多谐振荡器，其中第一晶体管的基极通过时间常数电路（R5-R6-C1）耦合到第二晶体管的集电极（R5-R6-C1），该电路包括具有 负温度系数。 该多谐振荡器激发与光电晶体管（T1）配合的电致发光二极管（D1）。 集成后，接收到的信号控制换向器（晶闸管Th1和Th2）。 该电路由具有二极管（D11至D14）的整流桥馈电，并由两条导线形成。 用于检测阻挡由二极管（D1）发射的发光束的物体的存在。

    Astable multivibrator circuit
    8.
    发明授权
    Astable multivibrator circuit 失效
    瞬态多谐振荡器电路

    公开(公告)号：US4216441A

    公开(公告)日：1980-08-05

    申请号：US973451

    申请日：1978-12-26

    Applicant: Finis C. Easter

    Inventor： Finis C. Easter

    IPC: H03K3/282

    CPC classification number: H03K3/2828

    Abstract: An astable multivibrator includes a first transistor a single capacitor arranged in a time constant circuit, coupled to the emitter of the transistor and a potential divider circuit coupled to the base of the transistor to apply a selectable portion of a bias supply thereto. A circuit including another transistor of polarity opposite to that of the first transistor responds to the first transistor in its conductive or non-conductive state for determining the portion of potential applied to the first transistor such as to drive the transistor into greater conduction when it is conducting and further from conduction when it is non-conducting. The threshold levels of the transistors track the voltage supply, which may be varied, such that the frequency and duty factor of the multivibrator are invariant with changes in voltage supply value.

    Abstract translation: 不稳定的多谐振荡器包括：第一晶体管，布置在时间常数电路中的单个电容器，耦合到晶体管的发射极;以及分压器电路，耦合到晶体管的基极，以将偏置电源的可选择部分施加到晶体管。 包括具有与第一晶体管的极性相反的极性的另一个晶体管的电路响应第一晶体管处于其导电或非导通状态，以确定施加到第一晶体管的电位的部分，以便当晶体管成为 在不导通时导通并进一步导通。 晶体管的阈值电平跟踪可能变化的电压源，使得多谐振荡器的频率和占空比随电压供应值的变化而不变。

    Circuit arrangement for an automatic integrated intravaginal stimulator
    9.
    发明授权
    Circuit arrangement for an automatic integrated intravaginal stimulator 失效
    自动综合阴道内刺激器的电路布置

    公开(公告)号：US3973571A

    公开(公告)日：1976-08-10

    申请号：US604815

    申请日：1975-08-14

    Applicant: Peter Suhel

    Inventor： Peter Suhel

    IPC: A61N1/36 ,  H03K3/282

    CPC classification number: A61N1/36007 ,  H03K3/2828

    Abstract: An intravaginal stimulator is provided for correcting urinary incontinence which employs a plurality of transistors to form an oscillator with the load formed by the user in series with the battery whereby the circuit is rendered inactive until placed in use.

    Abstract translation: 提供阴道刺激器用于校正尿失禁，其使用多个晶体管来形成具有由用户与电池串联形成的负载的振荡器，由此使电路变得无效直到使用。

Patent Agency Ranking