中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

6 records (took 0.011 seconds)

    Frequency shift modulator with amplitude compensation
    1.
    发明授权
    Frequency shift modulator with amplitude compensation 失效
    频率补偿调制器

    公开(公告)号：US3638142A

    公开(公告)日：1972-01-25

    申请号：US3638142D

    申请日：1970-07-20

    Applicant: ERICSSON TELEFON AB L M

    Inventor： WIDL WALTER HERBERT ERWIN ,  OLOFSSON ERIK HERBERT

    IPC: H04L27/12 ,  H03C3/04

    CPC classification number: H04L27/12

    Abstract: A frequency modulator apparatus receives pulse signals switching between two amplitudes. The pulse signals are fed, via a modulator means which transmits square wave signals switching between two frequencies, to an integrator means. The integrator means converts the square wave signals to triangular-shaped signals which are then converted to substantially sinusoidal signals. There is also included means for compensating for the frequency dependent changes in amplitude of the signals introduced by the integrator means.

    Abstract translation: 频率调制器装置接收在两个幅度之间切换的脉冲信号。 脉冲信号经由调制器装置馈入，该调制器将在两个频率之间切换的方波信号传送到积分器装置。 积分器意味着将方波信号转换为三角形信号，然后将其转换为基本正弦信号。 还包括用于补偿由积分器装置引入的信号的频率相关的幅度变化的装置。

    Synchronizing signal generator for use with a differentially multiphase modulated signal receiver
    2.
    发明授权
    Synchronizing signal generator for use with a differentially multiphase modulated signal receiver 失效
    与差分多路调制信号接收机同步信号发生器

    公开(公告)号：US3665328A

    公开(公告)日：1972-05-23

    申请号：US3665328D

    申请日：1970-06-24

    Applicant: ERICSSON TELEFON AB L M

    Inventor： WIDL WALTER HERBERT ERWIN

    IPC: H04L27/18 ,  H04L27/233 ,  H03D3/02

    CPC classification number: H04L27/2331

    Abstract: In data receivers used for receiving and demodulating a differentially multiphase modulated signal, i.e. a signal in which the phase position is changed with definite intervals wherein the magnitude of the phase change determines the information contents of the signal received, there is included an arrangement for producing a control signal upon the occurrence of such phase changes. The arrangement includes a phase comparison circuit having one input supplied by the input of the receiver and another input connected to the output of a delay circuit connected to the receiver input. The delay of said delay circuit is approximately equal to half of the interval in which the phase position is changed. The output signal value of the phase comparison circuit is changed at the beginning of each interval and the control signal is obtained from a differentiating circuit connected to the output of the phase comparison circuit.

Patent Agency Ranking