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116 条记录 (耗时 0.01 秒)

    Stability controlled high frequency chopper-based oscillator
    16.
    发明授权
    Stability controlled high frequency chopper-based oscillator 有权
    稳定控制的高频斩波器振荡器

    公开(公告)号：US09543972B2

    公开(公告)日：2017-01-10

    申请号：US14926304

    申请日：2015-10-29

    申请人： Texas Instruments Incorporated

    发明人： Ramamurthy Venkata Ramanan ,  Venkiteswaran Mahadevan

    IPC分类号： H03K3/03 ,  H03L7/24 ,  H03K3/08 ,  H03L7/00 ,  H03K3/027 ,  H03K3/02

    CPC分类号： H03L7/24 ,  H03K3/011 ,  H03K3/02 ,  H03K3/027 ,  H03K3/0315 ,  H03K3/08 ,  H03L7/00

    摘要： Circuitry for providing an oscillating output signal. This circuitry includes a transconductance circuit having a first input, a second input, an output. The transconductance also includes a first transistor, a second transistor, and chopping circuitry. The chopping circuitry is for alternatively connecting, in a first clock cycle phase, a first node to a first terminal of the first transistor and a second node to a first terminal of the second transistor and, in a second clock cycle phase, following the first clock cycle phase, the first node to the first terminal of the second transistor and the second node to a first terminal of the first transistor. An oscillator circuit is also included and coupled to receive voltage from the output of the transconductance circuit, wherein the oscillating output signal is responsive to an output of the oscillator circuit. Further connected to the transconductance circuit are circuitry for providing a first voltage to its first input and a frequency controlled circuit for providing a second voltage to its second input.

    摘要翻译： 提供振荡输出信号的电路。 该电路包括具有第一输入，第二输入和输出的跨导电路。 跨导还包括第一晶体管，第二晶体管和斩波电路。 斩波电路用于在第一时钟周期阶段中将第一节点交替连接到第一晶体管的第一端子，将第二节点连接到第二晶体管的第一端子，并且在第二时钟周期阶段中，跟随第一晶体管的第一节点 时钟周期相位，第一晶体管的第一节点到第二晶体管的第一端子，第二节点连接到第一晶体管的第一端子。 还包括并耦合振荡器电路以从跨导电路的输出接收电压，其中振荡输出信号响应于振荡器电路的输出。 进一步连接到跨导电路是用于向其第一输入提供第一电压的电路和用于向其第二输入提供第二电压的频率控制电路。

    Vertical sweep multivibrator having false trigger protection
    17.
    发明授权
    Vertical sweep multivibrator having false trigger protection 失效
    具有虚拟触发保护功能的垂直扫描器

    公开(公告)号：US3681712A

    公开(公告)日：1972-08-01

    申请号：US3681712D

    申请日：1970-04-10

    申请人： GTE SYLVANIA INC

    发明人： WAYBRIGHT GEORGE CLEVELAND

    IPC分类号： H03K3/08 ,  H04N5/12

    CPC分类号： H03K3/08 ,  H04N5/12

    摘要： For a television receiver, a vertical sweep multivibrator of the type employing first and second interconnected amplifiers with vertical sync pulses capacitor-coupled across a diode in the cathode circuit of the first amplifier. A resistor connected across the sync pulse coupling capacitor provides both a discharge path for the coupling capacitor and a bias path for the diode during the vertical trace interval to reduce false triggering in response to noise and video peaks. A resistor connected between the diode and the cathode of the first amplifier degenerates the grid circuit of the first amplifier to reduce false triggering in response to any undesired horizontal feedback signals.

    摘要翻译： 对于电视接收机，采用第一和第二互连放大器的垂直扫描多谐振荡器，其中垂直同步脉冲电容耦合在第一放大器的阴极电路中的二极管上。 连接在同步脉冲耦合电容器上的电阻器在垂直跟踪间隔期间提供用于耦合电容器的放电路径和二极管的偏置路径，以减少响应于噪声和视频峰值的错误触发。 连接在第一放大器的二极管和阴极之间的电阻器使第一放大器的电网电路退化，以减少响应于任何不需要的水平反馈信号的错误触发。