Neutralizing device for repetition rate of integrated electronic circuit controlled by timing signal, uses two monostable circuits which produce pulses from timing signal with rising and falling pulse edges

摘要

The device neutralizes a timing signal anomaly for an integrated circuit set by the timing signal (H). This is for anomalies for a timing pulse signal duration of less than a first step value (t1min), or a duration between two timing pulses less than a second step value (t2min). The anomaly sensor (1) activates an inhibiting mechanism when the anomaly is detected in the timing signal. The device includes a first monostable circuit (4) receiving on an input the timing signal (H), and delivering at an output, for each falling edge of the timing signal, of a pulse whose duration is equal to the second value (t2min). There is a second monostable circuit (5) receiving on an input the signal, and delivering at an output, for each rising front of the timing signal (H), of a pulse whose duration is equal to the first value (t1min)'. A logic circuit (6) processes the two pulses and sends a trigger pulse to the inhibit each time the timing signal produces an anomaly.