# Operational Amplifier Parameters AssessmentExit this survey

In order to receive full credit for completing this training, you must complete the following multiple choice assessment and achieve a score of 70% or greater.

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2. Which of the following is not an assumption of ideal op amp analysis?
 Which of the following is not an assumption of ideal op amp analysis?   Current flow into the input of the op amp is zero.The output impedance is infinite.The op amp gain is infinite.The voltage between the input leads is zero.
3. Which of the following is the inverting op amp’s closed loop gain for the schematic shown below?
 Which of the following is the inverting op amp’s closed loop gain for the schematic shown below?   (Vout/Vin) = 1 - (Rf/Rg)(Vout/Vin) = 1 + (Rf/Rg)(Vout/Vin) = (-Rf/Rg)(Vout/Vin) = (Rf/Rg)
4. Which of the following is the non-inverting op amp's closed loop gain for the schematic shown below?
 Which of the following is the non-inverting op amp's closed loop gain for the schematic shown below?   (Vout/Vin) = 1 + (Rf/Rg)(Vout/Vin) = 1 - (Rf/Rg)(Vout/Vin) = (-Rf/Rg)(Vout/Vin) = (Rf/Rg)
5. For an inverting op amp which of the following is true?
 For an inverting op amp which of the following is true?   The output signal is completely in phase with the input signal.There is no output signal.The output signal is completely out of phase with the input signal.
6. Which of the following correctly defines Input Offset Voltage, VOS?
 Which of the following correctly defines Input Offset Voltage, VOS?   VOS is the output voltage due to two unequal input voltages.VOS is the differential voltage that must be applied to the input of an op amp to produce an output of zero.VOS is a measure of the difference between the input and output voltage.
7. Generally, which of the following types of input stages of an op amp typically has lower offset voltage?
 Generally, which of the following types of input stages of an op amp typically has lower offset voltage?   JFETBipolarCMOS
8. When a customer designs a circuit using an op amp that has poor PSRR, what can the designer do to compensate?
 When a customer designs a circuit using an op amp that has poor PSRR, what can the designer do to compensate?   Add bypass capacitors.Improve the ground planes.Apply a DC signal.Buffer the op amp.
9. For the test circuit shown below, the optional VOS buck input is best described by which of the following?
 For the test circuit shown below, the optional VOS buck input is best described by which of the following?   A voltage applied to the input that is equal and the same sign as the measured VOS.A voltage applied to the input that is twice the value but opposite in sign to the measured VOS.A voltage applied to the input that is equal but opposite in sign to the measured VOS.A voltage applied to the input that is half the value but opposite in sign to the measured VOS.
10. The value listed as TCVOS can be described by which of the following?
 The value listed as TCVOS can be described by which of the following?   The average rate of change in input offset voltage per unit change in temperature.The rate of change in input offset voltage per unit change in supply voltage.The square value of the rate of change in input offset voltage per unit change in temperature.
11. If PSRR is a crucial specification in a design, which of the following is the best op amp to consider?
 If PSRR is a crucial specification in a design, which of the following is the best op amp to consider?   80dB100dB50dB90dB
12. The Input Bias Current can be found using which of the following?
 The Input Bias Current can be found using which of the following?   Adding the current from both inputs. IB=IINV + INON-INVSquaring the sum from both inputs. IB = (IINV + INON-INV)2Subtracting the inverting input from the non-inverting input. IB = INON-INV - IINVÂ Taking the average of the current from both inputs. IB = (IINV + INON-INV) /2
13. Which of the following is recommended as one good method to compensate for Input Bias Current?
 Which of the following is recommended as one good method to compensate for Input Bias Current?   Designing in a compensation capacitor.Designing in a compensation resistor.Supply another current that is equal but opposite in sign.Greatly increase the value of the feedback resistor.
14. Because newer products are focused on single supply operation, datasheets use which of the following terminology to specify the maximum and minimum output voltage?
 Because newer products are focused on single supply operation, datasheets use which of the following terminology to specify the maximum and minimum output voltage?   VMH and VMLVSH and VSLVOH and VOLVSM and VSH
15. The -3 dB point refers to which of the following?
 The -3 dB point refers to which of the following?   The frequency bandwidth measured at the point where the op amp's gain falls to 0.707 or 1/âˆš(2) of its low frequency value.The frequency bandwidth measured at the point where the op amp's gain falls to 0.577 or 1/ âˆš(3) of its low frequency value.The frequency bandwidth measured at the point where the op amp's gain rises to 0.707 or 1/âˆš(2) of its low frequency value.The frequency bandwidth measured at the point where the op amp's gain rises to 0.577 or 1/ âˆš(3) of its low frequency value.
16. Which of the following is the best explanation of Slew Rate?
 Which of the following is the best explanation of Slew Rate?   Slew Rate expresses how much the op amp increases the input voltage.Slew Rate expresses how fast the op amp's input follows the output.Slew Rate expresses how fast the op amp's output can follow the input.Slew Rate is the time required for the output voltage to settle to within a specified percentage of the final value given a step input.
17. Using the graph below, choose the value that represents the shutdown current for the LMH6647 at room temperature.

 Using the graph below, choose the value that represents the shutdown current for the LMH6647 at room temperature.   0.65 mA0.01 mA0.45 mA0.80 mA
18. Using the graph below at what voltage will the LMH6647 shutdown?
 Using the graph below at what voltage will the LMH6647 shutdown?   Less than 3.2V.Greater than 4.5V.
19. On the datasheet what term do you know refers to the limits beyond which damage to the device may occur?
 On the datasheet what term do you know refers to the limits beyond which damage to the device may occur?   Operating RatingsAbsolute Maximum RatingsCharacteristic TableApplication Information
20. For the Standard Test Loop Circuit shown below, if the VOS Output = 650 mV, then what is the actual offset voltage of the DUT op amp?
 For the Standard Test Loop Circuit shown below, if the VOS Output = 650 mV, then what is the actual offset voltage of the DUT op amp?   65 µv650 nV650 µV650 mV