Golf

staple Op Amp Offset Errors
Practical 3
Procedure
1. relate the rope with the LM 741. Measure Vo with a multimeter and calculate Ib+, the scuttlebutt curve current to the non inverting terminal

Ib+ =Vo/1M

2. Connect the circuit. Measure Vo with a multimeter and calculate Ib-, the infix bias current to the non inverting terminal

Ib- =Vo/1M

3. acquire the input offset current, I10, where

I10 =Ib+-Ib-

4. Connect the circuit. Measure Vo and check I10 =Vo/1M and compare it with the encourage already determined.
5. Determine the average input bias current IB and compare with value quoted on the data sheet

Ib = IB+- IB-/2
6. Connect the circuit as shown in figure 4. Measure Vo with a multimeter and determine and determine the input offset electric potential.

V10 = VO/1+10K/ cytosineR

7. Connect the circuit. Vary R1 until the output voltage is zero.

Results
1. Ib+ = Vo/1M =77.8Mv/0.000001 = 77.8Ma
2. Ib- = Vo/1M = 77.8Mv
3. I10 =Ib IB- =0Ma
4. 0.00005/0.000006 = 50Pa
5. Ib IB+- IB-/2 = 77.8Ma 77Ma/2 =0
6. V10 = Vo / 1+10k/100R =3.3mV / 1+10000/100 = 32.67uV

Conclusion
We got the voltage to zero by varying the current. on that point was very little errors as values were good and were connatural as to the expected output.



Op amps are very higher(prenominal) come amplifiers with differential inputs and single-ended outputs. They are often used in high precision analogy circuits, so it is important to measure their surgical process accurately.
But in open-loop measurements their high open-loop gain, which may be as great as 107 or more, makes it very hard to stave off errors from very small voltages. The measurement process can be greatly simplified by using a servo loop to force a null at the amplifier input, therefrom allowing the amplifier under test to essentially measure its own errors.

Basic Op Amp closed loop Amplifier
Practical 1
Equipment needed:
* 2 oscilloscopes
* Power supply
* 9K resistor
* 1K resistor
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