A-002-11: Quartz crystal - properties and applications
A-002-11-01:
What is a crystal lattice filter?
A filter with narrow bandwidth and steep skirts made using quartz crystals
A filter with wide bandwidth and shallow skirts made using quartz crystals
An audio filter made with four quartz crystals that resonate at 1 kHz intervals
A power supply filter made with interlaced quartz crystals
A-002-11-02:
What factor determines the bandwidth and response shape of a crystal lattice filter?
The relative frequencies of the individual crystals
The centre frequency chosen for the filter
The gain of the RF stage following the filter
The amplitude of the signals passing through the filter
A-002-11-03:
For single-sideband phone emissions, what would be the bandwidth of a good crystal lattice filter?
2.1 kHz
15 kHz
500 Hz
6 kHz
A-002-11-04:
The main advantage of a crystal oscillator over a tuned LC oscillator is:
much greater frequency stability
longer life under severe operating use
freedom from harmonic emissions
simplicity
A-002-11-05:
A quartz crystal filter is superior to an LC filter for narrow bandpass applications because of the:
crystal's high Q
crystal's low Q
LC circuit's high Q
crystal's simplicity
A-002-11-06:
Piezoelectricity is generated by:
deforming certain crystals
touching crystals with magnets
adding impurities to a crystal
moving a magnet near a crystal
A-002-11-07:
Electrically, what does a crystal look like?
A very high Q tuned circuit
A very low Q tuned circuit
A variable capacitance
A variable tuned circuit
A-002-11-08:
Crystals are sometimes used in a circuit which has an output an integral multiple of the crystal frequency. This circuit is called:
an overtone oscillator
a crystal multiplier
a crystal lattice
a crystal ladder
A-002-11-09:
Which of the following properties DOES NOT apply to a crystal when used in an oscillator circuit?
High power output
Good frequency stability
Very low noise because of high Q
Good frequency accuracy
A-002-11-10:
Crystal oscillators, filters and microphones depend upon which principle?
Piezoelectric effect
Hertzberg effect
Ferro-resonance
Overtone effect
A-002-11-11:
Crystals are NOT applicable to which of the following?
Active filters
Microphones
Lattice filters
Oscillators
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