| 摘要 |
PURPOSE:To eliminate erroneous operation and erroneous inoperation even if the frequency of a used power source is largely varied by adding a simple logic circuit to the defect detector of an APPS of a narrow band double pulse output. CONSTITUTION:Only a main pulse is produced by an AND circuit 32-a from double pulses, and is set to the set signal of a flip-flop 31, and the main pulse of the phased delayed by 120 or 180 deg. from the previous signal is set to the reset signal of the flip-flop 31. The AND of the set signal of the flip-flop 31 and the output of an oscillator 33 is taken by the AND circuit 32-a, and the output is counted by a counter 34. A comparator 35 outputs a signal when the counted value of the counter 34 exceeds the prescribed value, and the signal is externally outputted through an output circuit 36. |
