Electronic Filters and ADCs in Biomedical Applications

Which of the following is a characteristic of a low-pass filter?

• A) Allows frequencies below the cutoff frequency to pass through

• B) Allows frequencies above the cutoff frequency to pass through

• C) Passes a specific band of frequencies and attenuates others

• D) Attenuates a specific band of frequencies and passes others

What is the advantage of using oversampling in sigma-delta ADCs?

• A) Reduced noise

• B) Increased power consumption

• C) Higher sampling rate

• D) Decreased resolution

In which biomedical application would a high-pass filter be commonly used?

• A) Blood pressure monitoring

• B) ECG (Electrocardiogram) recording

• C) Pulse oximetry

• D) Spirometry

In which biomedical application would a flash ADC be commonly used?

• A) ECG (Electrocardiogram) recording

• B) MRI (Magnetic Resonance Imaging)

• C) Blood glucose monitoring

• D) Spirometry

What is the primary purpose of a notch filter in biomedical signal processing?

• A) To attenuate all frequencies equally

• B) To enhance specific frequency components

• C) To eliminate interference at a specific frequency

• D) To amplify the signal across all frequencies

In which biomedical application would a dual-slope ADC be commonly used?

• A) Blood pressure monitoring

• B) Electrocardiography (ECG)

• C) Spirometry

• D) MRI (Magnetic Resonance Imaging)

What is the purpose of the quantization step in the ADC process?

• A) To convert the analog signal into a digital representation

• B) To amplify the analog signal before conversion

• C) To filter out noise from the analog signal

• D) To modulate the analog signal

What does the sampling rate of an ADC represent?

• A) The maximum frequency of the input signal that can be accurately digitized

• B) The number of bits used to represent the digital output

• C) The number of samples taken per second from the analog input signal

• D) The maximum voltage that can be converted to a digital value

In which biomedical application would a low-pass filter be commonly used?

• A) Electroencephalography (EEG)

• B) Pulse oximetry

• C) Phonocardiography (PCG)

• D) Electromyography (EMG)

Which of the following is a characteristic of a band-stop filter?

• A) Attenuates frequencies below the stopband and above the passband

• B) Attenuates frequencies within a specific range and passes others

• C) Passes frequencies within a specific range and attenuates others

• D) Passes all frequencies while providing gain