| 摘要 |
PURPOSE:To analyze the quantity of digital data by using a variable threshold level. CONSTITUTION:A data signal is supplied to the uninverted input terminals of comparator 10 and 12, a constant reference threshold level is supplied to the inverted input terminal of the comparator 10, and the variable threshold level is supplied to the inverted input terminal of the comparator 12. Each comparator generates a high output when its input data signal level is larger than its threshold level. Glitch latch circuits 14 and 16 input transition crossing the threshold levels several times between system clocks, expand it to one cycle of the system clocks, and output other normal transmission as it is. A trigger logic circuit stores data in a memory 24 when data of plural channels match one group of previously programmed events and a muP 26 analyzes the data. |
