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homework7a

# homework7a - Physics 300 Section 062 HomeWOrk Assignment 7...

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Unformatted text preview: Physics 300 Section 062 HomeWOrk Assignment # 7 Due at the beginning of the Tuesday October 24, 2006 lab. 1 State the Golden rules of Op—Amp operation. 2 Using arguments similarlto those used to derive equation 7.5 derive equation 7.6 in your text. 3 What will the approximate voltage of the inverting input be if the non-inverting input is at ground for an op—amp in an inverting ampliﬁer circuit; 4 Using the data you obtained in section 7.2.1, make a graph of Vout versus Vin. On this graph label the op—amp’s positive and negative saturation voltages as well as the input offset voltage. Finally, using this graph show how you calculated the open loop gain of your op-amp. 5 Op—amps have gains of 100,000 or more in many conﬁgurations. Using ﬁgure 7.3 this problem will demonstrate to you all the steps that are needed to keep the inverting and non—inverting inputs at nearly, although not identical, voltages. Assume the gain is 105 and R1 and R2 are 1 k9 each. What output voltage would be needed to keep the inverting input at 5V assuming that the voltage at the non—inverting input is 5V? If this were to happen, then the output voltage would actually drop to zero since there is no difference in the input voltages. The actual voltage at the output needs to be slightly less than the value you just calculated. Using the gain of this ampliﬁer, determine what the output voltage needs to be to keep the op—amp in a stable, steady—state condition. Make sure to carry your signiﬁcant ﬁgures out to at least 10 digits as only a very small difference between the two inputs is needed to generate a large enough output. 1 6a Can a non-inverting op—amp of gain E be constructed using only 1 op—amp? Why Not? Design a non—inverting op—amp circuit with gain 5 using 2 op—amps. ...
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