List the parameters that should be considered for ac and dc applications. Explain what is a voltage transfer curve of an op-amp? An operational amplifier, abbreviated as op-amp, is basically a multi-stage, very high gain, direct-coupled, negative feedback amplifier that uses voltage shunt feedback to provide a stabilized voltage gain. Op-amp is used mostly as an integrator than a differentiator because in differentiator at high frequency, gain is high and so high-frequency noise is also amplified which absolutely abstract the differentiated signal. Devices in the circuit should be allowed time for saturation and desaturation. Voltage controlled Voltage source D.
The curve drawn between output voltage and input differential voltage, for an op-amp, keeping voltage gain A constant is known as voltage transfer curve. False Answer :- B 5. But when the two input terminals are connected to the same input source then the gain established by the differential amplifier is called the common mode gain. Integrators are widely used in ramp or sweep generators, filters, analog computers etc. In Explain what way is the voltage follower a special case of the non-inverting amplifier? Explain what are the applications of an inverting amplifier? The ideal Opamp output voltage is maintained constant. It is called operational amplifier because it is used for performing different functions like differentiation, addition, integration, subtraction.
Voltage follower has three unique characteristics viz. Explain what is an adder or summing amplifier? Adder, subtractor, differentiator, integrator fall under the category of linear circuits. All of the above Answer: C 35. Define offset voltage as applied to an op-amp. In order for an output to swing above and below a zero reference, the op-amp circuit requires: A.
Not need an input resistor B. Answer :- C 28 The output voltage Vo of the above circuit is a -6V b -5V c -1. Explain what is a differential amplifier? The feedback resistance divided by the input resistance D. The open-loop voltage gain Aol of an op-amp is the A. The ratio between differential gain and common-mode gain is called: A.
The ratio of the input resistance to feedback resistance B. A series dissipative regulator is an example of a: A. Explain what are differential gain and common-mode gain of a differential amplifier? In this condition it is known as perfect balance. When the difference of the two inputs applied to the two terminals of a differential amplifier is amplified, the resultant gain is termed as differential gain. Open-loop gain Answer :- C 19 A differential amplifier has a differential gain of 20,000.
So it will be always more than one 2. Explain what are the applications of integrators? Adder or summing amplifier is a circuit that provides an output voltage proportional to or equal to the algebraic sum of two or more input voltages multiplied by a constant gain factor. Characteristics not drifting with temperature 6. Explain why open-loop op-amp configurations are not used in linear applications? A noninverting closed-loop op-amp circuit generally has a gain factor: A. By keeping 1 inverting amplifier and three no of sources V1, V2, V3 in series corresponding input resistors R1, R2, R3 , we can get this equation.
With negative feedback, the returning signal: A. This is done basically to provide the op-amps with a very high A. . Input offset voltage may be defined as that voltage which is to be applied between the input terminals to balance the amplifier. Current controlled Voltage source C. Explain what kind of negative feedback is present in a noninverting op-amp.
The input resistance Answer :- C 4. If Vi is a triangular wave, then V0 will be A. Give examples of linear circuits. If ground is applied to the + terminal of an inverting op-amp, the — terminal will A. Another name for a unity gain amplifier is: A.