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