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Flip to reveal answersWhat are the four parts of an electronic system?
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All 4 Flashcards — The systems model
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Question
What are the four parts of an electronic system?
Answer
Input — a device that senses a change and produces a signal. Process — the thing that decides. Output — a device that acts on the world. Feedback — a path carrying a measurement of the output back to the process.
Question
Why is a quantity a wrong answer in an input box?
Answer
Because a circuit cannot act on a quantity. Name the device that turns it into a signal — a thermistor, an LDR, a microphone, a push switch.
Question
How do you test whether a system has feedback?
Answer
Ask whether anything in the circuit measures the OUTPUT. A timer counts whatever happened; a thermistor inside an oven measures the result of the heating.
Question
Work an electric oven through the systems model.
Answer
Input: a thermistor in the cavity. Process: a controller comparing with the dial setting. Output: the heating element. Feedback: the thermistor measures the air the element is heating.
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Topic 3.4 hub
Electronic systems
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