| 摘要 |
PURPOSE:To obtain a high reliability control output by providing analog memories and only connecting output points mutually on wire-OR basis, and thus obtaining doubled structure. CONSTITUTION:An analog control circuit 1 connects with voltage followers 21 and 31, whose output terminals are connected to output transistors (TR) 9 and 10 through protective resistances 51 and 61. An output line 20 is fed back to the voltage followers 21 and 31. A TR7 is normally turned off to have high impedance, and then permits the voltage follower 21 to control the TR9. In this case, a TR8 is turned on and the base of the TR10 is fixed at 0 volt to inhibit the voltage follower 31 from controlling the TR10. If a fault is detected, said conditions are inverted. |
