公开(公告)号：US4028627A

公开(公告)日：1977-06-07

申请号：US645003

申请日：1975-12-29

申请人： Susumu Cho ,  Paul Milton Erickson ,  Michael William Null

发明人： Susumu Cho ,  Paul Milton Erickson ,  Michael William Null

IPC分类号： G01R19/04 ,  G11C27/02 ,  H04B1/10 ,  H04B1/16

CPC分类号： G11C27/024 ,  G01R19/04 ,  H04B1/10

摘要： An audio signal quality detector connected to receive an audio signal from the discriminator of a radio receiver and including an envelope detector connected to the output of the discriminator and supplying a signal indicative of the envelope of the audio to a resettable valley detector which stores a voltage indicative of the lowest valley applied thereto subsequent to a reset pulse and a sample and hold gate connected to the valley detector for sampling the voltage stored in the valley detector prior to periodic reset pulses applied to the valley detector. Circuitry is also included for inhibiting the operation of the sample and hold gate when there is no output from the valley detector.

摘要翻译： 音频信号质量检测器，其被连接以从无线电接收机的鉴频器接收音频信号，并且包括连接到鉴别器的输出的包络检测器，并将指示音频包络的信号提供给可存储电压的可复位谷值检测器 指示在复位脉冲之后施加到其上的最低谷，以及连接到谷值检测器的采样和保持门，用于在施加到谷值检测器的周期性复位脉冲之前对存储在谷值检测器中的电压进行采样。 还包括电路，用于当谷检测器没有输出时，禁止采样和保持门的工作。