What is monostable multivibrator?

Question

What is monostable multivibrator?

Answer 1

A monostable, also called a one-shot, is a circuit that when triggered, produces a pulse of predetermined width. The width is determined usually by an external R and C, and is about equal to the product of R and C, with a fudge factor thrown in.

The trigger is usually a pulse, but can be an edge, ie, the rising edge of a signal, or the falling edge of a signal.

The term is applied equally to the entire circuit, or to the IC itself.

Common ICs are 555 and LS123.

There are two types. Retriggerable and not retriggerable.  Retriggerable ones can be retriggered while the output is true, and the output will continue to be true for another time period. Not retriggerable ones will ignore the second trigger. An example. If the one-shot is set for 1 second, and it is triggered at t = 0, the 1 second pulse will start. If a second trigger occurs at t = 0.7 second, then the output will stay true for an additional 1 second after the second trigger for a total of 1.7 seconds.

Answer 2

A multivibrator is an electronic circuit used to implement a variety of simple two-state systems such as oscillators, timers and flip-flops. It is characterized by two amplifying devices (transistors, electron tubes or other devices) cross-coupled by resistors and capacitors. The most common form is the astable or oscillating type, which generates a square wave - the high level of harmonics in its output is what gives the multivibrator its common name. The mulitvibrator originated as a vacuum tube (valve) circuit described by William Eccles and F.W. Jordan in 1919.

monostable, in which one of the states is stable, but the other is not - the circuit will flip into the unstable state for a determined period, but will eventually return to the stable state. Such a circuit is useful for creating a timing period of fixed duration in response to some external event. This circuit is also known as a one shot. A common application is in eliminating switch bounce.

Answer 3

this term seems familiar,

oh yes, i also never got the topic and i cleared that darned electronics course, ('twas a nightmare )

u keep up the gud  job