modified 11 years ago

Non Inverting Amplifier Full Analysis

01:55:40

Resistor Layout

Vin--+                 \/Output
         OP AMP----
         -                   /
         |                   \   R2 = 20k
         |__________/
                             /
                             \   R1 = 5k
                             /
                          GND
Full Analysis:

GIVEN:
Vin = 2V
R1 = 5k
R2 =20k
Va = Vb
A = Vout/Vin

Calculate:
I1
Vout
A
-------------------------------------------------
Vin = Va = Vb = VR1 = I1 × R1
I1 = Vin/R1 = 2/5000 = 0.4mA

Vout = (R1 + R2) × I1
Vout = (5k + 20k) × 0.4
Vout = 25 × 0.4 = Vout

A = Vout/Vin = (R1 + R2) × I1 / R1 × I1
A = R1 + R2/R1
A = 5 + 20 / 5 = 5

Vout = Vin × A = 2×5=10V

published 11 years ago

sibieta

11 years ago

How can you make the v source 2v and freq 1khz

kaivanveldhoven

11 years ago

Tap the sine wave source and then in the left hand corner a little wrench should appear. Klik on the wrench and then you can set all the settings for the source :)

sibieta

11 years ago

I click the wrench and i see a line, a sine wave and square wave icons, but when i tap the line in the circuit to attempt to change the voltage for que freq source, it changes to a dc source, and when i tap the sine wave icon i get the freq source again with 1khz but with 1v buy default.... :-) weird maybe is the version... thanks though

kaivanveldhoven

11 years ago

No, you tap on the source, then the wrench and then you tap on the word frequency, on the word itself with the little yellow bar in front lol! :p

sibieta

11 years ago

Oh you are totally right!!! Thanks again

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