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Questions and Answers
Which of the following is a major difference between embedded systems and PLCs?
Which of the following is a major difference between embedded systems and PLCs?
- Embedded systems are generally more expensive than PLCs
- The application program of an embedded system can be reprogrammed or modified in a short time like a PLC (correct)
- All PLCs are embedded systems, but not all embedded systems are PLCs
- Programming PLCs is more complicated than coding a µC
What is a characteristic of programming PLCs compared to coding a µC?
What is a characteristic of programming PLCs compared to coding a µC?
- µCs have a price trade-off for extra features
- PLCs have less complex programming compared to µCs (correct)
- µCs cannot be used in car wash automation
- PLCs are generally more expensive than µCs
Which of the following is a good application for PLCs according to the text?
Which of the following is a good application for PLCs according to the text?
- Car wash automation (correct)
- Operating system development
- Mobile app development
- Graphic design
What is a feature of embedded systems mentioned in the text?
What is a feature of embedded systems mentioned in the text?
What is a cost trade-off mentioned in the text regarding PLCs?
What is a cost trade-off mentioned in the text regarding PLCs?
What is the goal of equalization in communication systems?
What is the goal of equalization in communication systems?
Which circuit can help compensate for low-pass filtering in a communication channel?
Which circuit can help compensate for low-pass filtering in a communication channel?
Which equalizer implementation pre-distorts the transmitted pulse to invert channel distortion?
Which equalizer implementation pre-distorts the transmitted pulse to invert channel distortion?
Which approach is commonly used to set the coefficients of a TX FIR filter?
Which approach is commonly used to set the coefficients of a TX FIR filter?
What is the limitation of a TX FIR filter in terms of low-frequency content?
What is the limitation of a TX FIR filter in terms of low-frequency content?
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Study Notes
Computer Controlled Systems and PLCs - Lecture Summary
- Lecture 1 on Computer Controlled Systems by Dr. Mohammed M Abozahhad on 16/10/2023
- Distinctions between embedded systems and PLCs: All PLCs are embedded systems, but not vice versa. PLCs are more easily reprogrammable and less complex to program than embedded systems.
- PLC applications: Car wash automation, material handling, laser cutting, elevators, and pouch filling machines.
- Equalization in communication systems: Goal is to remove time-domain inter-symbol interference and amplify high-frequency content.
- Compensating for low-pass filtering: High-pass filter can help compensate for low-pass filtering in a communication channel.
- Equalizer implementation: RX DFE implementation pre-distorts the transmitted pulse to invert channel distortion.
- Setting coefficients of a TX FIR filter: Least Mean Squares (LMS) Algorithm is commonly used to set the coefficients of a TX FIR filter.
- Limitation of a TX FIR filter: It attenuates low-frequency content.
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