1) SAW device is used as Report

Filter

Oscillator

Both (i) & (ii)

2) The maximum fundamental frequency of x'tal oscillator Report

33 MHz

55 MHz

50 MHz

3) The distance between twon adjoining finger in SAW Report

Equal to an acoustic wave length of the frequency

Multiple of wave length along the surface of the material

Both (i) & (ii)

4) SAW resonator is placed in series with a ________ between input & output of an amplifier to produce oscillation Kennedy 420 Report

Resonant circuit

Phase shift network

Capacitor

5) The phase shift network in series with SAW resonator could be used to Report

Oscillation

Amplification

Both (i) & (ii)

6) The upper frequency limit of SAW device Report

Limited by substrate used

Photo etching accuracy

Both (i) & (ii)

7) These are not semiconductor active devices Report

Strip line & micro strip

Surface acoustic wave

Both (i) & (ii)

8) Inter electrode capacitance in bipolar transistros depend on Report

the width of the depletion layers at the junctions

the thickness of depletion layer

On the reverse bias voltage

9) The width of depletio layer dpends on Report

Operating bias voltage

Reverse bias voltage

the depth of depletion layer

10) The highest frequency at which current gain may be obtained Report

Current gain bandwidth frequency

At frequency at which β falls to unity

Both (i) & (ii)

11) The current gain bandwidth (Ft) is proportional to both collector voltage & collector current upto a certain point which yields ______ which is due to ________ Report

Maximum collector current

Higher drift voltage & shorter transit time

Maximum collector voltage

12) With transistor regeneration & oscillations are possible when the output impedance is _________ that input impedance, Report

Higher, Unity

Unity, Higher

Lower, Unity

13) Micro stip is analogous to Report

Strip line

Transmission line

Wave guide

14) Micro strip has the advantage over strip line in being Report

Simplex construction

Easier integration

Both (i) & (ii)

15) Micro strip & strip line is widely preferred & used Report

Higher than 100 GHZ

Lower than 100 GHZ, low power

Lower than 100 GHZ, low & medium power

16) Indicate false statement. An advantage of strip line over micro strip is its Report

Easier integration with semiconductor devices

lower tendency to radiate

Higher Q

17) To-72 package is available for frequency Report

Above 2GHZ for bipolar transistor

Above 2 GHXZ for FET

Above 12 GHZ gor FET

18) Higher velocity thought semiconductor means Report

Faster transit time & high dissipation

Faster transit time & lower dissipation

Both (i) & (ii)

EASA Questions Radio Nav. Set 6

Set 1

Set 2

Set 3

Set 4

Set 5

Set 6

Set 7