51. What is the difference voltage if the inputs are an ideal in-phase signal?
52. Refer to this figure. The purpose of R1 and R2 is
53. Refer to the given figure. If an input signal of –0.5 V were applied, determine the output voltage.
54. Calculate the input voltage if R1 = 100 , Rf = 1 k, and Vout = 550 mV.
55. The midrange open-loop gain of an op-amp is 135 dB. With negative feedback this gain is reduced to 72 dB. The closed-loop gain is
56. Refer to the given figure. Find the midrange gain of this op-amp amplifier.
57. What is the level of the current through the amplifier input(s) to ground in an op-amp?
58. Open-loop voltage gain of an op-amp can range up to ________.
59. At what input voltage level does the output voltage level become numerically equal to the value of the common-mode gain of the amplifier?
60. Refer to the given figure. The unity-gain bandwidth of this op-amp is 10.4 kHz. What is the bandwidth of the circuit?
61. Which of the following is (are) the result of gain reduction by a feedback?
62. The common-mode rejection ratio (CMRR) is defined by ________.
63. ________ is the unit for the slew rate, SR.
64. An operational amplifier has a ________ input impedance and a ________ output impedance.
65. Inverting amplifier connection is more widely used because it has ________.
66. An operational amplifier is a ________ gain and ________ bandwidth differential amplifier.
67. The ratio of the unity-gain frequency to the cutoff frequency is numerically equal to the level of ________.
68. In double-ended (differential) input operation, ________.
69. If two opposite-polarity input signals are applied, the operation is referred to as ________.
70. If the same input is applied to both inputs, the operation is called ________.
71. In a differential amplifier circuit, if an input signal is applied to either input with the other input connected to ground, the operation is referred to as ________.
72. Ideally, the value of the CMRR is ________. Practically, the ________ the value of CMRR, the better the circuit operation.
73. As the frequency increases, the input impedance of an op-amp ________ and the output impedance ________.
74. When both input signals are the same, a common signal element due to the two inputs can be defined as the ________ of the two signals.
75. The feedback component of an integrator is a(n) ________.