bistable + astable circuits + npn transistors

[snowbrood]

can anyone provide me notes on the above topics??

 

[scouserlfc]

You still wanna study this ?

 

[snowbrood]

You still wanna study this ?

yes buddy because my seniors also studied this

 

[scouserlfc]

yes buddy because my seniors also studied this

So simple ask them for help on it !

 

[snowbrood]

So simple ask them for help on it !

i could have done this but my those seniors are now not in the city...and those who are i dont kw where they are

 

[scouserlfc]

HAve u tried finding in Wikipedia or google as i think almost no one knows abt it here.

 

[Nibz]

can anyone provide me notes on the above topics??

An astable circuit has no stable state, i.e it changes from one state to the other at a constant rate.
Examples: Indicator Lights of vehicles & pulse generator.

And a bistable circuit has two stable states. (It is made using two NAND gates or two NOR gates )
Example: Shop counters & Electrical Memories of computers.

'npn-transistor' is a transistor that has a layer of p-type semiconductors sandwiched between two layers of n-type semiconductors. (Google p-type and n-type semiconductors, if you don't know these terms)