AA Chapter 6 - Filters

Refer to the frequency response curve shown in Fig 1 . Identify the type of filter circuit.

• Low pass filter.

• High pass filter.

• Band pass filter.

• Pass band filter.

Refer to Fig 2. The band of frequencies 10 kHz to 100 kHz is applied to the input of the filter network in Fig 1001. State the frequencies that will appear at point A.

• 0 Hz to 10 kHz.

• 10 kHz to 60 kHz

• 10 kHz to 100 kHz.

• 60 kHz to 100 kHz.

Refer to Fig 3, identify the type of filter.

• RC low pass active filter.

• RC high pass active filter.

• RC low pass passive filter.

• RC high pass passive filter.

Refer to Fig 4. Identify the type of filter circuit.

• RC low pass active filter.

• RC high pass active filter.

• RC low pass passive filter.

• RC high pass passive filter.

A electronic filter that passes signals with frequencies lower than a certain cut-off frequency and rejects signals with frequencies higher than the cut-off frequency is known as

• Low pass filter.

• High pass filter.

• Band pass filter.

• Pass band filter.

A electronic filter that passes signals with frequencies higher than a certain cut-off frequency and rejects signals with frequencies lower than the cut-off frequency is known as

• Low pass filter.

• High pass filter.

• Band pass filter.

• Pass band filter.

At the cut-off frequency, the output voltage of a low pass filter is

• 20% of the input voltage.

• 70.7% of the input voltage.

• 90% of the input voltage.

• 100% of the input voltage.

A band-pass filter is an electronic device or circuit that

• allows signals between two specific frequencies to pass, but reject frequencies outside that range.

• allows signal lower than a certain cut-off frequency to pass, but reject frequencies higher than the cut-off frequency.

• allows signals outside the two specific frequencies to pass, but reject frequencies within that range.

• allows signal higher than a certain cut-off frequency to pass, but reject frequencies lower than the cut-off frequency.

Calculate the cut-off frequency of a RC low pass filter given the resistor is 10 kΩ and capacitor is 10 nF.

• 1591 Hz.

• 159.1 Hz.

• 15.91 Hz.

• 1.591 Hz.

Calculate the cut-off frequency of a RC low pass filter given the resistor is 33 kΩ and capacitor is 4700 pF

• 10261 Hz.

• 1026.1 Hz.

• 102.61 Hz.

• 10.26 Hz.