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Software Defined Radio Interview
RF integrated circuits generally comprise of _____
a) resonators and resistors
d) resonators and capacitors
RF MEMS gives _______ alternative to electronic switching circuits.
a) an electromechanical
b) a mechanical
c) an electro-dynamic
d) an interconnected
Which of these is not a technique used to induce sharp resonance in resonators?
In resonators with nanoscale I-beams, which factor does not affect the mechanical frequencies of I-beams?
d) Distance between beam and bottom of the cavity
The industry standard figure of merit for an RF switch is ______
RF MEMS allows selection of ____ and ____, increasing the degree of freedom in design process.
a) digital circuit and reverse engineering
b) analog circuit and reverse engineering
c) digital circuit and reengineering
d) analog circuit and reengineering
Superconducting analog filters can reduce noise and interference introduced by wide bandwidth of SDR architecture.
Superconductors use ____ to maintain working temperature near _____
a) heat sinks, 70K
b) open cooling system, 80K
c) forced air, 75K
d) closed cooling system, 70K
RF amplifiers tend to be ____ amplifiers.
a) class A
b) class B
c) class C
d) class AB
Which of the following modulation type is incompatible with class C operation?
a) Frequency modulation
Electronically Programmable Analog Components are also called as ____
c) Gate Array ASIC
d) Cell based ASIC
Which of the following is not a challenge to RF/IF conversion stage in military application?
a) Low phase noise
b) Tunable pre-selector
c) Single RF/IF up-down conversion
d) Fast tuning synthesizers
____ fixes the input power dynamic range such that there are no sinusoidal RF conversion artifacts in the output.
a) Noise Figure
b) Two tone intermodulation product
The Nyquist criterion states that the sampling frequency of a band limited analog waveform must be at least ______ component to properly reconstruct the signal.
a) half the maximum frequency
b) twice the maximum frequency
c) half the minimum frequency
d) twice the minimum frequency
The useful dynamic range applicable for antenna, RF/IF conversion, and ADC’s is given by the ratio of smallest processable signal to the smallest detectable signal.
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