| 摘要 |
PURPOSE:To decrease the number of control lines by providing the shift register which operates synchronizing with the both area of the system carrying out the mutual remote control between two areas. CONSTITUTION:Oscillator O generates pulse (a), and pulse (a) is supplied to shift registers S1 and S2 provided at areas P and Q each. And output signals (b)-(g) of each step are supplied to AND gates A1-An. The synchronism is secured for the output between S1 and S2, and the same output is secured at the same step. The control signals supplied to terminals E1-Em at area P give the conduction to the 2nd AND gate groups of area Q with the timing which gives the conduction to 1st AND gate groups A1-Am, and then extract control signal information E to the output of 2nd AND gate groups B'1-B'm. As a result, the control lines required hitherto m+n pieces or more can be reduced down to several pieces. |
