A signal of 1 kHz is to be amplified, but the circuit board and wires pick up and store a 60 Hz component from a nearby electric line. If this component is 40 dB higher than the desired signal, what filter stopband attenuation is necessary to ensure the signal remains 20 dB above the interference level?

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TuteeHUB · Accepted Answer

LPF with SBA of 60 dB at 1 kHz

TuteeHUB · Answer

High pass filter with stopband attenuation of 60 dB at 60 Hz

TuteeHUB · Answer

HPF with SBA of 60 dB at 1 kHz

TuteeHUB · Answer

Low pass filter with stopband attenuation of 60 dB at 60 Hz

1.	A signal of 1 kHz is to be amplified, but the circuit board and wires pick up and store a 60 Hz component from a nearby electric line. If this component is 40 dB higher than the desired signal, what filter stopband attenuation is necessary to ensure the signal remains 20 dB above the interference level?
A.	High pass filter with stopband attenuation of 60 dB at 60 Hz
B.	LPF with SBA of 60 dB at 1 kHz
C.	HPF with SBA of 60 dB at 1 kHz
D.	Low pass filter with stopband attenuation of 60 dB at 60 Hz
Answer» B. LPF with SBA of 60 dB at 1 kHz

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