3-F-047: Filters
3-47F1:
A good crystal band-pass filter for a single-sideband phone would be?
2.1 KHz.
5 KHz.
500 Hz.
15 KHz.
3-47F2:
Which statement is true regarding the filter output characteristics shown in Figure 3F16?
A is a low pass curve and D is a band stop curve.
C is a low pass curve and B is a band pass curve.
B is a high pass curve and D is a low pass curve.
A is a high pass curve and B is a low pass curve.
3-47F3:
What are the three general groupings of filters?
High-pass, low-pass and band-pass.
Inductive, capacitive and resistive.
Audio, radio and capacitive.
Hartley, Colpitts and Pierce.
3-47F4:
What is an m-derived filter?
A filter that uses a trap to attenuate undesired frequencies too near cutoff for a constant-k filter.
A filter whose input impedance varies widely over the design bandwidth.
A filter whose product of the series- and shunt-element impedances is a constant for all frequencies.
A filter whose schematic shape is the letter “M”.
3-47F5:
What is an advantage of a constant-k filter?
It has high attenuation of signals at frequencies far removed from the pass band.
It can match impedances over a wide range of frequencies.
It uses elliptic functions.
The ratio of the cutoff frequency to the trap frequency can be varied.
3-47F6:
What are the distinguishing features of a Butterworth filter?
It has a maximally flat response over its passband.
A filter whose product of the series- and shunt-element impedances is a constant for all frequencies.
It only requires capacitors.
It requires only inductors.
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