公开(公告)号：JPH08163116A

公开(公告)日：1996-06-21

申请号：JP31645094

申请日：1994-12-20

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： JIYO SEIIKU ,  KIN HOSHIMICHI ,  TEI KIHAN ,  SOU GENTETSU ,  RI KUNFUKU

IPC: H04M7/08 ,  H04J3/00 ,  H04J3/06 ,  H04L7/08

Abstract: PURPOSE: To realize the frame synchronization device to demultiplex a time division multiplex signal in parallel from an STM-4C structure of a broad band overall information communication network in compliance with the ITU-T recommendations. CONSTITUTION: A serial parallel conversion circuit 10 and a byte arrangement circuit 30 detect a frame byte from high speed reception data at a transmission rate of 622 Mbps, align bytes based on a detected time and provides an output of frame data as 8-bit parallel data. A synchronizing signal pattern detection circuit 90 and a consecutive pattern confirmation circuit 100 detect frame bytes continuously based on a low speed clock obtained by applying 8 frequency division from an original clock signal at a frequency divider circuit 70 to seek a frame synchronizing signal. As a result, the power consumption is reduced and the amount of the hardware is decreased.

公开(公告)号：JPH0750575A

公开(公告)日：1995-02-21

申请号：JP34420192

申请日：1992-12-24

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： SHIN KISEN ,  SOU GENTETSU ,  KIN HOSHIMICHI

IPC: H03K17/04 ,  H03K17/66 ,  H03K19/013 ,  H03K19/018 ,  H03K19/086

Abstract: PURPOSE: To obtain a quicker switching characteristic, without adding elements nor changing a current by considerably reducing the impedance which drives a capacitor. CONSTITUTION: An output part 130 includes an emitter follower transistor TR 212, which is connected between a first power terminal VCC and an output node 213 and is turned on by the voltage level of a collector node 111 of a TR 102, a pull-down TR 214 which is connected between the output node 213 and a second power terminal VEE, a TR 216 which is turned on by the voltage level of a collector node 110 of a TR 101 connected between the first power terminal VCC and a node 211, and a resistance 215 and a capacitor 217 which are connected in parallel between the node 211 and a node 218, which generates a voltage for drive of the pull-down TR 214.