On and off states generate fixed-width pulse circuit

In many control systems , it is sometimes required
to provide a pulse with stable width when the switching value changes,
such as pulses when jumping up, pulses when jumping down, and
pulses when changing up and down.
It is easy to implement this function by using a monostable trigger . The picture shows a circuit
that generates pulses when it jumps up and down . The problem that should be paid attention to when determining the pulse width is that the pulse width should be significantly smaller than the switching value change that causes the pulse generation. cycle . Among them, the 555 timer works in the monostable trigger state.