Diff amplifier

135

02:05:23

 if I change the valu of the resistor to bigger resistor , the Ad (Vout /vin)  change as it should 

published 11 years ago

Rumaty

11 years ago

Not too sure exactly what you're trying to achieve,but, if you want solid 10v across both resistors then use 5ohms

hurz

11 years ago

There is no emitter resistor so the gain is Rc/Re=100k/0k. Not infinite, but around the transistor beta which is fir 1V much to high. And 1mA at 100kOhm is 100V split in best case on two resistors is still 50V. So go down to 10k for Rc and insert 1k emitter resistors.

Tavor

11 years ago

I did what you told me, but still dont see what is the gain here. The output is less then the input.. Or maybe I Just dont understand. Thank you for the comment :-)

hurz

11 years ago

No you dont. Forget it, try something easier for you.

Tavor

11 years ago

Well, so I didnt give up

hurz

11 years ago

And well a sine looks different

Tavor

11 years ago

What i didnt understand is why u told me to insert RE. my problem was that the transistor was not in the active situation

hurz

11 years ago

It was "hyperactive"

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.