Sample and hold demodulator circuit
    1.
    发明公开
    Sample and hold demodulator circuit 有权
    Demodulatorschaltung unter Verwendung einer Abtast- und Halteschaltung

    公开(公告)号:EP1091484A1

    公开(公告)日:2001-04-11

    申请号:EP99402422.2

    申请日:1999-10-04

    IPC分类号: H03D1/22

    CPC分类号: H03D5/00

    摘要: A sample and hold demodulator circuit for use in an automotive immobiliser to recover modulation information from a received modulated carrier signal (V RD ), the circuit comprising: sample and hold means for sampling the received signal to recover the modulation information therein, and control means (214) coupled to the sample and hold means for controlling operation thereof, the control means comprising shift register means (252) for receiving the received signal (V RD ) and for producing at its outputs signals (SAMPLE, SAMPLE2, LATCH) for controlling operation of the sample and hold means. The circuit provides a single IC solution, allowing amplitude and phase demodulation to be performed with a single sample and hold circuit without requiring a dedicated microcontroller or extra interfaces or wires to a main electronic control unit elsewhere in the automobile.

    摘要翻译: 一种用于汽车防盗器的采样和保持解调器电路,用于从接收到的调制载波信号(VRD)中恢复调制信息,该电路包括:采样和保持装置,用于对接收的信号进行采样以恢复其中的调制信息;以及控制装置 214),其耦合到用于控制其操作的采样和保持装置,所述控制装置包括用于接收接收信号(VRD)的移位寄存器装置(252),并且用于在其输出端产生用于控制操作的信号(SAMPLE,SAMPLE2,LATCH) 采样和保持装置。 该电路提供单个IC解决方案,允许使用单个采样和保持电路执行幅度和相位解调,而无需专用微控制器或额外的接口或电线连接到汽车其他地方的主电子控制单元。