Q.1
An internally compensated op amp is specified to have an open-loop dc gain ofdB and a unity gain bandwidth of 3 MHz. Find fb and the open-loop gain at fb.
  • a) 15Hz and 103 db
  • b) 30Hz and 103 db
  • c) 15 Hz and 51.5 db
  • d) 30 Hz and 51.5 db
Q.2
A single-pole model has __________ db/decade roll-off of the gain.
  • a) -3 db/decade
  • b) -6 db/decade
  • c) -10 db/decade
  • d) -20 db/decade
Q.3
Single-pole model is also known as
  • a) Frequent pole
  • b) Stable pole
  • c) Dominant pole
  • d) Responsive pole
Q.4
An op amp having a 106-dB gain at dc and a single-pole frequency response with ft = 2 MHz is used to design a non-inverting amplifier with nominal dc gain ofThe 3-dB frequency of the closed-loop gain is
  • a) 10 kHz
  • b) 20 kHz
  • c) 30 kHz
  • d) 40 kHz
Q.5
An internally compensated op amp has a dc open-loop gain ofV/V and an AC open-loop gain ofdB atkHz. Estimate its gain–bandwidth product and its expected gain at 1 kHz.
  • a) 0.1 MHz and -60 db
  • b) 10 MHz and -60 db
  • c) 10 MHz and 60 db
  • d) 1 MHz and 60 db
Q.6
An inverting amplifier with nominal gain of −V/V employs an op amp having a dc gain ofand a unity-gain frequency ofHz. What is the 3-dB frequency f3dB of the closed-loop amplifier?
  • a) 2π 23.8 kHz
  • b) 2π 47.6 kHz
  • c) 2π 71.4 kHz
  • d) 2π 95.2 kHz
Q.7
cascading two identical amplifier stages, each having a low-pass STC frequency response with a 3dB frequency fresults in an overall amplifier with a 3dB frequency given by
  • a) √(√2+1) f1
  • b) √(√3-1) f1
  • c) √(√2-1) f1
  • d) √(√3+1) f1
Q.8
Find the ft required for internally compensated op amps to be used in the implementation of the closed loop amplifiers with dc gain of +V/V and 3db bandwidth of 100kHz?
  • a) 1 kHz
  • b) 10 kHz
  • c) 100 kHz
  • d) 1 MHz
Q.9
A particular op amp, characterized by a gain–bandwidth product ofMHz, is operated with a closed-loop gain of +V/V. What 3-dB bandwidth results? At what frequency does the closed-loop amplifier exhibit a −phase shift?
  • a) 21 kHz
  • b) 31.5 kHz
  • c) 42 kHz
  • d) 52.5 kHz
Q.10
Find the ft required for internally compensated op amps to be used in the implementation of the closed loop amplifiers with dc gain of -2 V/V and 3db bandwidth ofMHz?
  • a) 7.5 MHz
  • b) 15 MHz
  • c) 22.5 MHz
  • d) 30 MHz
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