opamp lm318 output problem.

[hiren.dave@bhuved.com]

hi,


i am using opamp lm318 for non inverting amplifier but it doesn't give proper output. i am attaching my ckt here.
if input is 1V and gain is 201 than output is 2v. VCC is 15V.


please help me to solve it.View attachment untitled.bmp

 

[milind.a.kulkarni]

Hi hiren,

At least how much I know I think LM318 is duel supply OPAMP so you need to give -V to -15v to first point
The second point is when you when you gives 1 v input and gain is very high like you said then vout saturates to VCC ideal but you will get little less than VCC....

Good Luck

 

[hiren.dave@bhuved.com]

hi milind.
thanks for your reply...


i am giving it 20v vcc at 7th pin and gnd to 4th. output is not changing if -vcc is given to 4th.

i got the output. i am attacing final circuit.

 

[goldsmith]

Dear hiren
Hi
Is your input a dc signal really ?
BTW : milind is absolutely right about minus supply .