Is the circuit ok? also please explain "What the circuit is doing"?

The circuit shown is supposed to produce AC where v1 is a 9v battery, c1,c2,c3,c4 are capacitors and t1 is  a transistor (BD140), R1 is a resistance

AC squarewave of 140-150 kHz is required .........sorry for poor image quality please use "magnifier " if needed.....Thanx in advnce!

Picture of Is the circuit ok? also please explain
sort by: active | newest | oldest
Won't work. Use a 555.
jatinbatra (author)  steveastrouk4 years ago
can u explain what is circuit doing?
R1, C1, C3 and one side of the output are only connected
to ground through C2, T1 and the base emitter junction.

There is no connection to +V1 !!!

Sorry  the  CIRCUIT  DOES  NOTHING as it is drawn.

jatinbatra (author)  iceng4 years ago
i didn't get...can u explain further?
There's no supply of power to the output.
I could be wrong but i don't think that will produce a square wave for you. My knowledge in this area is limited but i think you will need a PWM circuit to generate a good clean square wave. You could use a micro controller that has PWM to generate 150 Hz easily. All you would have to do is program it and your good to go.
jatinbatra (author)  mpilchfamily4 years ago
if possible please explain in detail...and what is this circuit doing...and please see again i have updated it!
That circuit will likely create a sign wave. Like i said my knowledge is limited here. So i'm unable to explain exactly how it will all work.
Depends... what are you trying to accomplish? What kind of AC output are you looking to get?
jatinbatra (author)  mpilchfamily4 years ago
i am looking for squarewave of some 150 kHz frequency