A-002-12: Advanced filter circuits - AF, RF
A-002-12-01:
What are the three general groupings of filters?
High-pass, low-pass and band-pass
Hartley, Colpitts and Pierce
Audio, radio and capacitive
Inductive, capacitive and resistive
A-002-12-02:
What are the distinguishing features of a Butterworth filter?
It has a maximally flat response over its pass-band
The product of its series and shunt-element impedances is a constant for all frequencies
It only requires conductors
It only requires capacitors
A-002-12-03:
Which filter type is decribed as having ripple in the passband and a sharp cutoff?
A Chebyshev filter
An active LC filter
A passive op-amp filter
A Butterworth filter
A-002-12-04:
What are the distinguishing features of a Chebyshev filter?
It allows ripple in the passband in return for steeper skirts
It requires only inductors
It requires only capacitors
It has a maximally flat response in the passband
A-002-12-05:
Resonant cavities are used by amateurs as a:
narrow bandpass filter at VHF and higher frequencies
power line filter
low pass-filter below 30 MHz
high pass-filter above 30 MHz
A-002-12-06:
On VHF and above, 1/4 wavelength coaxial cavities are used to give protection from high-level signals. For a frequency of approximatively 50 MHz, the diameter of such a device would be about four inches (10 cm). What would be its approximate length?
1.5 metres (5 ft)
0.6 metres (2 ft)
2.4 metres (8 ft)
3.7 metres (12 ft)
A-002-12-07:
A device which helps with receiver overload and spurious responses at VHF, UHF and above may be installed in the receiver front end. It is called a:
helical resonator
diplexer
directional coupler
duplexer
A-002-12-08:
Where you require bandwidth at VHF and higher frequencies about equal to a television channel, a good choice of filter is the:
None of the above
resonant cavity
Butterworth
Chebyshev
A-002-12-09:
What is the primary advantage of the Butterworth filter over the Chebyshev filter?
It has maximally flat response over its passband
It allows ripple in the passband in return for steeper skirts
It requires only inductors
It requires only capacitors
A-002-12-10:
What is the primary advantage of the Chebyshev filter over the Butterworth filter?
It allows ripple in the passband in return for steeper skirts
It requires only capacitors
It requires only inductors
It has maximally flat response over the passband
A-002-12-11:
Which of the following filter types IS NOT suitable for use at audio and low radio frequencies?
Cavity
Elliptical
Chebyshev
Butterworth
|
Color key:
|
|
● = Unseen
|
|
● = Weak
|
|
● = Review
|
|
● = Learned
|
|
● = Incorrect answer
|
