Monostable multivibrator no input, the transistor1 in active mode?

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In a monostable multivibrator circuit, if transistor T1 is in active mode continuously, current will flow through components RC1 and R, assuming a proper voltage rail connection. The circuit will remain stable until a negative input pulse is applied, which charges the input capacitor and turns T1 off, but this transition can only occur once without further input. If the circuit is powered solely by DC without any negative pulse, the current flow dynamics become questionable, particularly with capacitors involved. The discussion suggests that understanding the operation of such circuits can be enhanced through online resources. Overall, the behavior of the circuit hinges on the input conditions and the state of T1.
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If T1 is in active mode all the time, will there be any current flow in this circuit? ( I think it is impossible to flow) thanks
 

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If T1 is on then the circuit will remain stable until... The input on the bottom left has a capacitor in series with a diode. The first negative input pulse will charge the input capacitor and flip T1 to off, but that can happen only once.
 
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Outrageous said:
If T1 is in active mode all the time, will there be any current flow in this circuit? ( I think it is impossible to flow) thanks
If T1 is in the active region, there will be current flowing in RC1 and R at least.

assuming the lower horizontal line is connected to a suitable voltage rail[/size]
 
NascentOxygen said:
If T1 is in the active region, there will be current flowing in RC1 and R at least.

assuming the lower horizontal line is connected to a suitable voltage rail[/size]

If there is no pulse, and the whole is only supply with Dc and there are capacitors inside, how will the current move?
 
NascentOxygen said:
If T1 is in the active region, there will be current flowing in RC1 and R at least.

assuming the lower horizontal line is connected to a suitable voltage rail[/size]
Thanks, guys
If there is no negative pulse ,the whole circuit is only powered by Dc ,and there are capacitor inside, how will the current flow?
 
This sounds like a homework exercise.

It is a standard monostable multivibrator circuit. I am confident that a google search will
find its operation well-described. http://img811.imageshack.us/img811/5412/thgooglefriend1.gif
 
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