公开(公告)号：US5341417A

公开(公告)日：1994-08-23

申请号：US901757

申请日：1992-06-22

申请人： In-Hwan Hwang ,  Hye-Kyoung Lee ,  Yi-Sung Bae ,  Bang-Won Lee

发明人： In-Hwan Hwang ,  Hye-Kyoung Lee ,  Yi-Sung Bae ,  Bang-Won Lee

IPC分类号： H04M3/00 ,  H04B14/04 ,  H04M11/00 ,  H04M15/00 ,  H04Q3/42 ,  H04M3/18 ,  H04B1/10

CPC分类号： H04B14/04 ,  H04M11/002 ,  H04M15/00

摘要： An integrated PCM-CODEC circuit including a plurality of PCM subscriber lines consisting of a SLIC for interfacing a telephone line with a switching system, an impedance conformer and a PCM-CODEC, a common bus for transferring a telephone signal into or from a subscriber according to the time division rule for the timing of telephone line use, a telemetering signal source and a (synchronization signal for controlling portion of the telephone call called by the n'th subscriber. The PCM-CODEC circuit includes a buffer, a signal selector, an applied gain controller, an anti-aliasing filter, a telemetering signal filter, a BPF, a coder, a decoder, a LPF, a received-gain controller, a smoothing filter, an operational amplifier and a telemetering gate.

摘要翻译： 包括由用于将电话线与交换系统接口的SLIC，阻抗构图器和PCM-CODEC组成的多个PCM用户线的综合PCM-CODEC电路，用于将电话信号传送到用户或从用户传送电话信号的公共总线 对于电话线使用的定时的时分规则，遥测信号源和用于控制第n个用户所呼叫的电话部分的同步信号，PCM-CODEC电路包括缓冲器，信号选择器， 应用增益控制器，抗混叠滤波器，遥测信号滤波器，BPF，编码器，解码器，LPF，接收增益控制器，平滑滤波器，运算放大器和遥测门。