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140 条记录 (耗时 0.018 秒)

    Pulse counting FM demodulator
    25.
    发明授权
    Pulse counting FM demodulator 失效
    脉冲计数FM解调器

    公开(公告)号：US6064255A

    公开(公告)日：2000-05-16

    申请号：US152970

    申请日：1998-09-14

    申请人： Hitoshi Tomiyama

    发明人： Hitoshi Tomiyama

    IPC分类号： H03D3/00 ,  H03D3/04 ,  H03D5/00 ,  H03G11/06 ,  H03J1/00 ,  H03K9/06 ,  H04B1/16 ,  H04B1/26 ,  H04B1/40 ,  H04L27/06 ,  H04L27/14 ,  H04L27/156

    CPC分类号： H04B1/0057 ,  H03D3/04 ,  H03D5/00 ,  H03J1/0083 ,  H04B1/006 ,  H04B1/0092 ,  H04B1/26 ,  H04B1/406 ,  H04L27/06 ,  H04L27/14 ,  H04L27/156

    摘要： A pulse counting FM demodulator includes a differentiating circuit that differentiates an FM intermediate-frequency signal to produce a differentiated pulse signal. A trigger signal is generated based on the differentiated pulse signal and is used to control the charging and discharging of a capacitor that is included in a monostable multivibrator. The charging and discharging of the capacitor provides an output level inverting operation. A variable current source supplies the capacitor with a charging current that is varied in response to an externally supplied control voltage, and an output circuit provides a demodulated output signal having a level corresponding to the output level inverting operation in the monostable multivibrator.

    摘要翻译： 脉冲计数FM解调器包括微分电路，其区分FM中频信号以产生微分脉冲信号。 基于微分脉冲信号产生触发信号，并用于控制包含在单稳态多谐振荡器中的电容器的充电和放电。 电容器的充电和放电提供输出电平反转操作。 可变电流源向电容器提供响应于外部提供的控制电压而变化的充电电流，并且输出电路提供具有对应于单稳态多谐振荡器中的输出电平反相操作的电平的解调输出信号。

    Limiter amplifier
    26.
    发明授权
    Limiter amplifier 失效
    限幅放大器

    公开(公告)号：US4495429A

    公开(公告)日：1985-01-22

    申请号：US386513

    申请日：1982-06-09

    申请人： Takashi Oda ,  Koichi Nagata

    发明人： Takashi Oda ,  Koichi Nagata

    IPC分类号： H03F1/30 ,  H03G11/00 ,  H03G11/06 ,  G06G7/12 ,  H03F3/45 ,  H03K5/153

    CPC分类号： H03G11/002 ,  H03G11/00

    摘要： A limiter amplifier with a power supply has a plurality of cascade-connected differential amplifiers for limiting the amplitude of an input signal. Each of the amplifiers has a first constant current circuit. A biassing circuit, having a second constant current circuit, is connected to the input of the differential amplifier for supplying its biassing needs. A third constant current circuit activates the first and second constant current circuits. A voltage regulator is connected to the power supply for providing a constant voltage to each of the three constant current circuits. The voltage regulator and the first to third constant current circuits have the same temperature characteristics.

    摘要翻译： 具有电源的限幅放大器具有多个级联连接的差分放大器，用于限制输入信号的幅度。 每个放大器具有第一恒流电路。 具有第二恒流电路的偏置电路连接到差分放大器的输入端，用于提供其偏置需要。 第三恒流电路激活第一和第二恒流电路。 电压调节器连接到电源，以向三个恒定电流电路中的每一个提供恒定电压。 电压调节器和第一至第三恒流电路具有相同的温度特性。

    Fm limiter using single diode
    27.
    发明授权
    Fm limiter using single diode 失效
    FM LIMITER使用单一二极管

    公开(公告)号：US3768027A

    公开(公告)日：1973-10-23

    申请号：US3768027D

    申请日：1971-08-18

    申请人： WARWICK ELECTRONICS INC

    发明人： TUVKER MATZEK L

    IPC分类号： H03G11/06 ,  H03D3/00

    CPC分类号： H03G11/06

    摘要： A limiter circuit for an FM detector including a diode serially connected in the signal path between the FM signal source and the FM detector. A current source biases the diode into conduction. The limiter conducts low level FM signals without substantial alteration, suppresses low frequency signals, and limits the output when the input reaches a predetermined amplitude.

    摘要翻译： 一种用于FM检测器的限幅器电路，包括在FM信号源和FM检测器之间的信号路径中串联连接的二极管。 电流源将二极管偏置成导通。 限幅器进行低电平的FM信号而没有实质的改变，抑制低频信号，并且当输入达到预定幅度时限制输出。

    Amplifier-limiter circuit with reduced am to pm conversion
    28.
    发明授权
    Amplifier-limiter circuit with reduced am to pm conversion 失效
    放大器限幅电路具有减少AM到PM转换

    公开(公告)号：US3678405A

    公开(公告)日：1972-07-18

    申请号：US3678405D

    申请日：1970-08-26

    申请人： RCA CORP

    发明人： AVINS JACK

    IPC分类号： H03F1/44 ,  H03G11/06 ,  H03F1/38

    CPC分类号： H03G11/06

    摘要： An amplifier-limiter circuit, having a plurality of translating stages, which utilizes positive feedback to obtain an essentially constant phase delay in each translating stage from low signal wave input levels to relatively high input signal wave levels, where each translating stage goes into limiting. As each translating stage goes progressively into limiting, with stronger signal waves, the effect of the positive feedback automatically decreases.

    摘要翻译： 具有多个平移级的放大器限制器电路，其利用正反馈来在每个平移级中从低信号波输入电平到相对高的输入信号波级获得基本恒定的相位延迟，其中每个平移级进入限制。 随着每个翻译阶段逐渐进入限制，随着信号波的增强，正反馈的作用自动降低。