ECET 350 All Discussion Questions

ECET 350 Week 1 DQ 1 Active Filter Design Parameters What are the features you would consider essential if you were designing your perfect amplifier? Define the values for parameters, such as input resistance, output resistance, and voltage gain ECET 350 Week 1 DQ 2 Active Filter Component Choices Give a thorough discussion about why you chose a certain value for your perfect amplifier parameter (one of input resistance, output resistance, and voltage gain only). ECET 350 Week 2 DQ 1 Nyquist Sampling Requirements You are given an input signal with a maximum input frequency of 1 kHz. Also, given that the Nyquist criteria of a minimum sampling frequency is two times the highest input frequency, are there any potential problems of sampling the input signal at a sampling rate of exactly 2 kHz? ECET 350 Week 2 DQ 2 Sampling Frequency and Bit Resolution Given a real-time digital signal processing system, how do the sampling frequency and the number of bits used in performing the analog-to-digital conversion of an analog input signal impact the design and performance of the system? What features of the system are affected by these two factors? ECET 350 Week 3 DQ 1 Moving Average Filters This stock market uses moving average filters sometimes to determine the trend analysis of a stock’s performance. Discuss how you think this filtering of a stock’s value compares to filtering an input signal. Why do you think this is used for stocks? Can you think of any other applications of a moving average filter and why it would be useful? ECET 350 Week 3 DQ 2 Recursive and Nonrecursive Filters This week, both infinite (recursive) and finite (nonrecursive) filters and their responses, along with impulse and step responses, were discussed. List and discuss examples that might be seen in your daily life that might be modeled by either of these filters, and tell why you think they are either recursive or nonrecursive. Would an input to this example be a step or impulse function? For example, if you are in a large, empty room, such as a gymnasium, and someone yells out hey, what kind of input is the shout, and what is the effect or response of the gymnasium? ECET 350 Week 4 DQ 1 Effects of Phase Distortion Both the lecture notes and the textbook talk about the effects of phase distortion and how important linear phase in the pass band of a filter actually is. Why is linear phase important? ECET 350 Week 4 DQ 2 Filter Design Specifications Filter design specifications are obviously important as they are made according to the filter requirements of the system upon the input signal. However, in real-time systems, these specifications must be carefully considered to ensure that the signal processing processor is able to perform the desired filtering in real-time. What factors must be taken into consideration when implementing a digital filter in a real-time, signal processing system? ECET 350 Week 5 DQ 1 Summed Versus Cascaded Filter Design The text and lecture talk about various methods of creating band pass and band stop filters, frequency translation being one method and using either summed or cascaded filters as another approach. What factors do you think should be considered when deciding on which approach to take to design either a band stop or a band pass filter, and why? ECET 350 Week 5 DQ 2 Fixed Point Versus Floating Point Design Considerations Several factors were mentioned in the lecture regarding the real-time implementation of digital filters. Factors such as filter coefficient and signal quantization, fixed point versus floating point, general purpose micro versus digital signal processor, memory requirements, and calculation throughput were included. Suppose you were given a design to implement a speaker crossover filter consisting of one low-pass filter and one high-pass filter for an audio system. What kind of specifications would you require before designing and implementing the digital filters? What effects would your choice of sampling frequency and quantization bits have on the audio quality of music played through the system? ECET 350 Week 6 DQ 1 IIR Versus FIR Design Criteria Various comparisons are stated in the text and the lecture material between IIR and FIR filters. What sort of criteria do you think should be used in deciding which type of filter to use? ECET 350 Week 6 DQ 2 Differences Between IIR and FIR Filters Unlike FIR filters, IIR filters always have some degree of phase distortion in the pass band of the filter, regardless of type or design methodology. Given a particular filtering application, say a speaker crossover used for a stereo system to separate the bass frequencies from the high frequencies, what would be the effect of phase distortion on the music played through this system? ECET 350 Week 7 DQ 1 Comparison of Butterworth and Chebyshev Type I Filters Various comparisons are stated in the text and the lecture material between Butterworth and Chebyshev Type I IIR filters. What sort of criteria do you think should be used in deciding which type of filter to use? ECET 350 Week 7 DQ 2 Coefficient Quantization in IIR Filters Coefficient quantization has been demonstrated to have a significant effect on the processing of digital IIR filters. How do you think the introduction of feedback terms in IIR filters is affected by quantization, and is it more or less critical than the effect upon FIR filters? Include in your answer any differences or comparisons you have noticed between the aky[n-k] filter coefficients and the bkx[n-k] filter coefficients.