JPS5444803A - Synchronization system of loop circuit - Google Patents

Abstract

PURPOSE:To eliminate the need of a timing adjustment in each station by enabling one station to make an automatic adjustment of timing according to the variation in line length of the circuit. CONSTITUTION:When a plural number of stations are on a loop circuit, timing regulator 20 of one station makes an automatic adjustment of timing as the line length of the loop circuit varies. Namely, phase detector 22 is supplied with signal T10 from timing generator 21 via connection line 77 and with signal T11 from receiver 27 via connection line 76. This signal T11 is the signal obained by delay signal T10 by the loop circuit of timing line 61, driver circuit 24 and receiver 27 and detector 22 detects phase difference TD between both the signals to obtain delay time TD1, which is transmitted to delay device 23 to control the delay time. Consequently, an automatic adjustment of timing is done in one station as the line length of the circuit varies, so that the timing adjustment of each station can be omitted.