As shown in figure "A" of the illustrated...

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Question 1 of 205eccefa5bacbc34ba4d486b7

As shown in figure "A" of the illustrated proportional analog controller circuit, what is the primary purpose of operational amplifier "U3"? See illustration EL-0100.

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Question 1 of 20

5eccefa5bacbc34ba4d486b7

As shown in figure "A" of the illustrated proportional analog controller circuit, what is the primary purpose of operational amplifier "U3"? See illustration EL-0100.

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🔍 Key Concepts

• Look at how U2 (proportional gain amplifier) is already providing gain to the error signal before it reaches U3. • Notice the two 10 kΩ resistors around U3 and how they are connected between the input, output, and the inverting/non‑inverting terminals. • Think about the difference between an op‑amp used as a gain stage versus one used purely as an inverter or buffer.

💭 Think About

• If U2 is already labeled as the proportional gain amplifier, what extra function would U3 most likely need to perform on that signal? • When an op‑amp has equal input and feedback resistors on the inverting input, what does that say about its gain magnitude and its polarity (phase)? • Does the circuit around U3 show any place where a second signal (like a summing input) is being added, or is only a single signal being processed?

✅ Before You Answer

• Verify whether any additional signal is connected to U3 besides the output of U2; this will rule out a summing function. • Check if the input and feedback resistors on U3 are the same value (10 kΩ). For an inverting amplifier, equal values mean |gain| = 1. • Confirm that the only labeled gain stage for proportional control is U2; this helps determine whether U3’s job is to add more gain or mainly to change polarity.

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Question 1 of 205eccefa5bacbc34ba4d486b7

As shown in figure "A" of the illustrated proportional analog controller circuit, what is the primary purpose of operational amplifier "U3"? See illustration EL-0100.

Back

Question 1 of 20

5eccefa5bacbc34ba4d486b7

As shown in figure "A" of the illustrated proportional analog controller circuit, what is the primary purpose of operational amplifier "U3"? See illustration EL-0100.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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