A. greater than +100
B. slightly less than unity but positive
C. exactly unity but negative
D. about -10
0
An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is [Hint: Slew rate is defined as the max. rate of change of output voltage. Its unit is V/μS.
0
A differential amplifier is invariably used in the i/p stage of all OP-amps. This is done basically to provide the OP-amps with a very high_________?
A. 10 volts
B. 5 volts
C. 5/1 volts
D. 5/2 volts
0
The effective channel length of a MOSFET in a saturation decreases with increase in___________?
A. CMMR
B. Bandwidth
C. Slew rate
D. Open-loop gain
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An n- channel JFET has IDSS=2mA,and Vp=-4v.Its transconductance gm=in mA/V)for an applied gate to source voltage VGS=-2v is___________?
A. Gate voltage
B. Drain voltage
C. Source voltage
D. Body voltage
0
Class AB operation is often used in power large signal amplifiers in order to_________?
A. 0.25
B. 0.5
C. 0.75
D. 1
0
Negative feedback in an amplifier____________?
A. get maximum efficiency
B. remove even harmonics
C. overcome a crossover distortion
D. reducing collector dissipation
0
The current gain of a bipolar transistor drops at high frequencies because of____________?
A. Reduces gain
B. Increase frequency &phase distortion
C. Reduces bandwidth
D. Increases noise
0
Generally, the gain of a transistor amplifier falls at high frequencies due to the___________?
A. Transistor capacitances
B. High current effects in the base
C. Parasitic inductive elements
D. The early effect
0
The action of JFET in its equivalent circuit can best be represented as a_____________?
A. Internal Capacitance of the device
B. Coupling capacitor at the input
C. Skin effect
D. Coupling capacitor at the output
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