Common-mode rejection ratio is given by
The correct answers are:
If Av(d) = 3500 and ACM = 0.35, then CMRR is :
Expressed in dB
= 80 dB
The correct answers are: 10000, 80 dB
If a certain Op-Amp has a closed loop gain of 20 and an upper critical frequency of 10 MHz, the gain bandwidth product is :
GBW= 20 x 10 = 200MHz and gain bandwidth product is also defined as the frequency with unity gain.
The correct answers are: 20 MHz, unity gain frequency
The Op-Amp has the following parameters; Aol = 50000; Zin = 4MΩ and Zout = 50Ω. The values of input impedance, output impedance and close loop voltage gains are :
The feedback attenuation B is
zero for all practical purposes. The closed loop voltage gain is.
The correct answers are: Zout = 980mΩ, Acl(t) = -100
The circuit shown in the figure can be used as a
The given circuit is
It is an integrator and low-pass filter.
The correct answers are: low pass filter, Integrator
The inverting input terminal of an operational amplifier (Op-Amp) is shorted with output terminal apart from being grounded. A voltage signal V1 is applied to the noninverting input terminal of the Op-Amp. Under this configuration the Op-Amp function is as :
Correct Answer :- d
A differential amplifier.
Any differential amplifier has two inputs and two outputs (one is Vout and other is ground potential) The correct answers are: is a part of an Op-Amp, has two output
The data of Op-Amp shown in figure is.
Zin = 2MΩ, ZOut = 75Ω and AoI = 200000, then the correct matching pairs is.
The attenuation, B, of the feedback circuit is
= [1 + (200000)(0.0435)](2MΩ)
= 17.4 GΩ
The correct answers are: Attenuation of the feedback = +0.0435, Input impedance = +17.4 GΩ
In order to obtain a solution of the differential equation
involving voltage V(t) and V1 an Op-Amp circuit would require at least.
Since, it is a two degree linear differential equation, hence, two integrators are required, also one adder to calculate the sum of outputs.
The correct answers are: two Op-Amp integrator , one Op-Amp adder
A certain Op-Amp has an open loop voltage gain of 1,00,000 and a common mode gain of 0.2. The CMRR is :
Aol = 100000
Acm = 0.2
Expressed in decibels
The correct answers are: 500000, 114 dB