Communication electronics (Filter)

Filters are classified as:

• Analog or digital

• Passive or active

• Audio or radio frequency

• All of the mentioned

Figure (a) shows a

• High-pass filter

• Low-pass filter

• Band-pass filter

• None

If the value of C_A and C_B in figure below are increased by the same amount, the critical frequency will

• increase

• decrease

• no change

If two filters like the one in figure below are cascaded, the roll-off rate of the frequency response will............................

• increase

• decrease

• no change

Ideal response of filter takes place in Pass band frequency

• True

• False

Find out the low pass filter from the given frequency response characteristics.

• a

• b

• c

• d

From the figure as shown, the input wave fed into low-pass filter.

Which is the following the correct output wave?

• 
• 
• 
• 

From the figure as shown, the input wave fed into band-pass filter.

Which is the following the correct output wave?

• 
• 
• 
• 

The gain of the first order low pass filter

• Increases at the rate 20dB/decade

• Increases at the rate 40dB/decade

• Decreases at the rate 20dB/decade

• Decreases at the rate 40dB/decade

According to responses, match the following Filters

• Elliptic filter

• 
• Band-pass filter

• 
• Chebyshev I filter

• 
• Butterworth filter

• 
• Chebyshev II filter

•