What usually controls the open-loop cutoff frequency of an op amp?
Stray-writing capacitance
Base-emitter capacitance
Collector-base capacitance
Compensating capacitance
A compensating capacitor prevents
Voltage gain
Oscillations
Input offset current
Power bandwidth
At the unity-gain frequency, the open-loop voltage gain is
1
A vid(mid)
Zero
Very Large
The cutoff frequency of an op amp equals the unity-gain frequency divided by
The cutoff frequency
Closed-loop voltage gain
Unity
Common-mode voltage gain
If the cutoff frequency is 20 Hz and the midband open-loop voltage gain is 1,000,000 the unity-gain frequency is
20 Hz
1 MHz
2 MHz
20 MHz
If the unity-gain frequency is 5 MHz and the midband open-loop voltage gain is 100,000 the cut0ff frequency is
50 Hz
1.5 MHz
15 MHz
The initial slope of a sine wave is directly proportional to
Slew rate
Frequency
Capacitance
When the initial slope of a sine wave is greater than the slew rate,
Distortion occurs
Linear operation occurs
Voltage gain is maximum
The op amp works best
The power bandwidth increases when
Frequency decreases
Peak value decreases
Initial slope decreases
Voltage gain increases
A 741C contains
Discrete resistors
Inductors
Active-load resistors
A large coupling capacitor
A 741C cannot work without
Passive loading
DC return paths on the two bases
A small coupling capacitor
The input impedance of a BIFET op amp is
Low
Medium
High
Extremely high
An LF157A is a
Diff amp
Source follower
Bipolar op amp
BIFET op amp
If the two supply voltages are -+12 V the MPP value of an op amp is closest to
0
+12 V
-12 V
24 V
The open-loop cutoff frequency of a 741C is controlled by
A coupling capacitor
The output short circuit current
The power bandwidth
A compensating capacitor
The 741C has a unity-gain frequency of
10 Hz
20 kHz
The unity-gain frequency equals the product of closed-loop voltage gain and the
Tail current
Closed-loop cutoff frequency
Load resistance
If f unity is 10 MHz and midband open-loop voltage gain is 200,000 then the open-loop cutoff frequency of the op amp is
100 Hz
The initial slope of a sine wave increases when
Peak value increses
Cc increases
Slew rate decreases
If the frequency of the input signal is greater than the power bandwidth
Slew-rate distortion occurs
A normal output signal osscurs
Output offset voltage increases
Distortion may occur
An op amp has an open base resistor. The output voltage will be
Slightly different from zero
Maximum positive or negative
An amplified sine wave
An op amp has a voltage gain of 200,000. If the output voltage is 1 V, the input voltage is
2 uV
5 uV
10 mV
1 V
A 741C has supply voltages of -+15 V. If the output voltage is 1 V, the input voltage is
+ 15 V
27 V
30 V
Above the cutoff frequency, the voltage gain of a 741C decreases approximately
10 dB per decade
20 dB per octave
10 dB per octave
20 dB per decade
The voltage gain of an op amp is unity at the
Cutoff frequency
Unity-gain frequency
Generator frequency
When slew-rate distortion of a sine wave occurs, the output
Is larger
Appears triangular
Is normal
Has no offset
A 741C has
A voltage gain of 100,000
An input impedance of 2 M ohm
An output impedance of 75 ohm
All of the above
The closed-loop voltage gain of an inverting amplifier equals
The ratio of the input resistance to the feedback resistance
The open-loop voltage gain
The feedback resistance divided by the input resistance
The input resistance
The noninverting amplifier has a
Large closed-loop voltage gain
Small open-loop voltage gain
Large closed-loop input impedance
Large closed-loop output impedance
The voltage follower has a
Closed-loop voltage gain of unity
Closed-loop bandwidth of zero
A summing amplifier can have
No more than two input signals
Two or more input signals
A closed-loop input impedance of infinity
A small open-loop voltage gain
