Equivalent Analog Filtering

February 2, 2019 by 3200 Creative

Equivalent Analog Filtering

Question 1 of 2

1. Question
What is the best definition for an “equivalent analog filter”?
- The process of adjusting the frequency content of a song so it sounds like it was performed in a particular concert hall.
- Mapping a discrete-time filter to the continuous-time counterpart using the relationship between discrete- and continuous-time frequency, $\omega = \Omega T$ .
- Determining the overall continuous-time filtering effect of: sampling a continuous-time signal, applying a discrete-time filter to the samples, and then reconstructing a continuous-time signal from the filtered samples.
- Using analog circuit components to design filters with specified characteristics.
Correct

Incorrect
Question 2 of 2

2. Question
Assume there is no aliasing and ideal reconstruction of a signal is performed in a system consisting of a sampler, discrete-time filter, and D/A (reconstruction). Suppose the discrete-time filter is low pass with cutoff $\omega = \frac{\pi}{2}$ radians and the sampling frequency is 1000 Hz. What is the nature of the equivalent analog filter?
- High pass with cutoff $250$ Hz
- Low pass with cutoff $500$ Hz
- Band pass with pass band $750<f<1250$ Hz
- Low pass with cutoff $250$ Hz
- High pass with cutoff $500$ Hz
Correct

Incorrect