Test
Test 4 Study for Final
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Preguntas del test (25)
1The op amp can amplify
- AAC signals only
- BDC signals only
- CBoth AC and DC signals
- DNeither AC nor DC signals
2The tail current of a diff amp is
- AHalf of either collector current
- BEqual to either collector current
- CTwo times either collector current
- DEqual to the difference in base currents
3The input offset current equals the
- ADifference between the two base currents
- BAverage of the two base currents
- CCollector current divided by current gain
- DDifference between the two base-emitter voltages
4The tail current equals the
- ADifference between the two emitter currents
- BSum of the two emitter currents
- CCollector current divided by current gain
- DCollector voltage divided by collector resistance
5The voltage gain of a diff amp with an unloaded differential output is equal to Rc divided by
- Ar'e
- Br'e/2
- C2 r'e
- DRe
6The input impedance of a diff amp equals r'e times
- A0
- BRc
- CRe
- D2 ß
7A dc signal has a frequency of
- A0 Hz
- B60 Hz
- C0 to more than 1 MHz
- D1 MHz
8When the two input terminals of a diff amp are grounded,
- AThe base currents are equal
- BThe collector currents are equal
- CAn output error voltage usually exists
- DThe ac output voltage is zero
9A common-mode signal is applied to
- AThe noninverting input
- BThe inverting input
- CBoth inputs
- DThe top of the tail resistor
10The common-mode voltage gain is
- ASmaller than the voltage gain
- BEqual to the voltage gain
- CGreater than the voltage gain
- DNone of the above
11The input stage of an op amp is usually a
- ADiff amp
- BClass B push-pull amplifier
- CCE amplifier
- DSwamped amplifier
12When the two bases are grounded in a diff amp the voltage across each emitter diode is
- AZero
- B0.7 V
- CThe same
- DHigh
13The input offset current is usually
- ALess than the input bias current
- BEqual to zero
- CLess than the input offset voltage
- DUnimportant when a base resistor is used
14A compensating capacitor prevents
- AVoltage gain
- BOscillations
- CInput offset current
- DPower bandwidth
15At the unity gain frequency, the open-loop voltage gain is
- A1
- BAv (mid)
- CZero
- DVery large
16If the cutoff frequency is 20 Hz and the midband open-loop voltage gain is 1,000,000, the unity gain frequency is
- A20 Hz
- B1 MHz
- C2 MHz
- D20 MHz
17If the two supply voltages are ± 12 V, the MPP value of an op amp is closest to
- A0
- B+12 V
- C-12 V
- D24 V
18The 741 V has a unity-gain frequency of
- A10 Hz
- B20 kHz
- C1 MHz
- D15 MHz
19The initial slope of a sine wave increases when
- AFrequency increases
- BPeak value increases
- CCc increases
- DSlew rate decreases
20If the frequency of the input signal is greater than the power bandwidth,
- ASlew-rate distortion occurs
- BA normal output signal occurs
- COutput offset voltage increases
- DDistortion may occur
21An op amp has an open base resistor. The output voltage will be
- AZero
- BSlightly different from zero
- CMaximum positive or negative
- DAn amplified sine wave
22Above the cutoff frequency, the voltage gain of a 741 C decreases approximately
- A10 dB per decade
- B20 dB per octave
- C10 dB per octave
- D20 dB per decade
23The voltage gain of an op amp is unity at the
- ACutoff frequency
- BUnity-gain frequency
- CGenerator frequency
- DPower bandwidth
24When the slew-rate distortion of a sine wave occurs, the output
- AIs larger
- BAppears triangular
- CIs normal
- DHas no offset
25A 741 C has
- AA voltage gain of 100,000
- BAn input impedance of 2 MΩ
- CAn output impedance of 75 Ω
- DAll of the above
Información
- Descripción
- Nuclear Program Test sobre Test 4 Study for Final, creado por Katrina Himes el 12/06/2018.
- Autor
- Katrina Himes
- Idioma
- English
- Visitas
- 31
- Etiquetas
- Valoración
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