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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