14042230
Beschreibung
Quiz von Ron Macatangay, aktualisiert more than 1 year ago
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Erstellt von Ron Macatangay
vor mehr als 6 Jahre
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Frage 1
Frage
What usually controls the open-loop cutoff frequency of an op amp?
Antworten
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Stray-writing capacitance
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Base-emitter capacitance
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Collector-base capacitance
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Compensating capacitance
Frage 2
Frage
A compensating capacitor prevents
Antworten
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Voltage gain
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Oscillations
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Input offset current
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Power bandwidth
Frage 3
Frage
At the unity-gain frequency, the open-loop voltage gain is
Antworten
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1
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A vid(mid)
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Zero
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Very Large
Frage 4
Frage
The cutoff frequency of an op amp equals the unity-gain frequency divided by
Antworten
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The cutoff frequency
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Closed-loop voltage gain
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Unity
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Common-mode voltage gain
Frage 5
Frage
If the cutoff frequency is 20 Hz and the midband open-loop voltage gain is 1,000,000 the unity-gain frequency is
Antworten
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20 Hz
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1 MHz
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2 MHz
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20 MHz
Frage 6
Frage
If the unity-gain frequency is 5 MHz and the midband open-loop voltage gain is 100,000 the cut0ff frequency is
Antworten
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50 Hz
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1 MHz
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1.5 MHz
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15 MHz
Frage 7
Frage
The initial slope of a sine wave is directly proportional to
Antworten
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Slew rate
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Frequency
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Voltage gain
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Capacitance
Frage 8
Frage
When the initial slope of a sine wave is greater than the slew rate,
Antworten
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Distortion occurs
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Linear operation occurs
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Voltage gain is maximum
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The op amp works best
Frage 9
Frage
The power bandwidth increases when
Antworten
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Frequency decreases
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Peak value decreases
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Initial slope decreases
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Voltage gain increases
Frage 10
Frage
A 741C contains
Antworten
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Discrete resistors
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Inductors
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Active-load resistors
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A large coupling capacitor
Frage 11
Frage
A 741C cannot work without
Antworten
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Discrete resistors
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Passive loading
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DC return paths on the two bases
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A small coupling capacitor
Frage 12
Frage
The input impedance of a BIFET op amp is
Antworten
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Low
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Medium
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High
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Extremely high
Frage 13
Frage
An LF157A is a
Antworten
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Diff amp
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Source follower
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Bipolar op amp
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BIFET op amp
Frage 14
Frage
If the two supply voltages are -+12 V the MPP value of an op amp is closest to
Antworten
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0
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+12 V
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-12 V
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24 V
Frage 15
Frage
The open-loop cutoff frequency of a 741C is controlled by
Antworten
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A coupling capacitor
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The output short circuit current
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The power bandwidth
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A compensating capacitor
Frage 16
Frage
The 741C has a unity-gain frequency of
Antworten
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10 Hz
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20 kHz
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1 MHz
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15 MHz
Frage 17
Frage
The unity-gain frequency equals the product of closed-loop voltage gain and the
Antworten
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Compensating capacitance
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Tail current
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Closed-loop cutoff frequency
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Load resistance
Frage 18
Frage
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
Antworten
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10 Hz
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20 Hz
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50 Hz
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100 Hz
Frage 19
Frage
The initial slope of a sine wave increases when
Antworten
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Frequency decreases
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Peak value increses
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Cc increases
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Slew rate decreases
Frage 20
Frage
If the frequency of the input signal is greater than the power bandwidth
Antworten
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Slew-rate distortion occurs
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A normal output signal osscurs
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Output offset voltage increases
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Distortion may occur
Frage 21
Frage
An op amp has an open base resistor. The output voltage will be
Antworten
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Zero
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Slightly different from zero
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Maximum positive or negative
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An amplified sine wave
Frage 22
Frage
An op amp has a voltage gain of 200,000. If the output voltage is 1 V, the input voltage is
Antworten
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2 uV
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5 uV
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10 mV
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1 V
Frage 23
Frage
A 741C has supply voltages of -+15 V. If the output voltage is 1 V, the input voltage is
Antworten
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0
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+ 15 V
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27 V
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30 V
Frage 24
Frage
Above the cutoff frequency, the voltage gain of a 741C decreases approximately
Antworten
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10 dB per decade
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20 dB per octave
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10 dB per octave
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20 dB per decade
Frage 25
Frage
The voltage gain of an op amp is unity at the
Antworten
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Cutoff frequency
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Unity-gain frequency
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Generator frequency
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Power bandwidth
Frage 26
Frage
When slew-rate distortion of a sine wave occurs, the output
Antworten
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Is larger
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Appears triangular
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Is normal
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Has no offset
Frage 27
Frage
A 741C has
Antworten
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A voltage gain of 100,000
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An input impedance of 2 M ohm
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An output impedance of 75 ohm
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All of the above
Frage 28
Frage
The closed-loop voltage gain of an inverting amplifier equals
Antworten
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The ratio of the input resistance to the feedback resistance
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The open-loop voltage gain
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The feedback resistance divided by the input resistance
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The input resistance
Frage 29
Frage
The noninverting amplifier has a
Antworten
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Large closed-loop voltage gain
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Small open-loop voltage gain
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Large closed-loop input impedance
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Large closed-loop output impedance
Frage 30
Frage
The voltage follower has a
Antworten
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Closed-loop voltage gain of unity
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Small open-loop voltage gain
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Closed-loop bandwidth of zero
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Large closed-loop output impedance
Frage 31
Frage
A summing amplifier can have
Antworten
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No more than two input signals
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Two or more input signals
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A closed-loop input impedance of infinity
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A small open-loop voltage gain
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