current amplifier - how to calculate the output?

[nishant22]

current amplifier

HI,
I have an amplifier which gives a voltage output and then that voltage controls the P- transistors and I therefore get a voltage out. I just know that as the input to amplifier is controlled by output from the block, the amplifier voltage would be bias voltage. I need smple equations which can help me get my final outputs.
I have calculted the output voltage from amplifier as gain*(vin-vtxp) now I dont know how to calulte teh oputputs from the transistors. I just know the output from transistor would go high if the output from op-amp is high, and low if op amp output is low.
Can anybody please help me.
thanks

 

[Old Nick]

Re: current amplifier

HI,
I have an amplifier which gives a voltage output and then that voltage controls the P- transistors and I therefore get a voltage out. I just know that as the input to amplifier is controlled by output from the block, the amplifier voltage would be bias voltage. I need smple equations which can help me get my final outputs.
I have calculted the output voltage from amplifier as gain*(vin-vtxp) now I dont know how to calulte teh oputputs from the transistors. I just know the output from transistor would go high if the output from op-amp is high, and low if op amp output is low.
Can anybody please help me.
thanks

You'll need to supply a circuit diagram or something, I have no idea what circuit you're trying to describe.

 

[fencl]

Re: current amplifier

if your circuit is some kind of simple LDO?