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Explore TopicChoose the Best Answer
A
Gain stage
B
Output stage
C
Differential input stage
D
Feedback network
Understanding the Answer
Let's break down why this is correct
Answer
The part that first boosts the signal is the input differential amplifier, usually a pair of transistors that form a differential pair. It takes the tiny voltage difference between the non‑inverting and inverting inputs and amplifies it with high open‑loop gain. This amplified voltage then drives the next stages of the op‑amp, such as the gain‑stage and output driver. For example, if the input difference is 1 µV, the differential pair can amplify it to several millivolts before the signal reaches the output stage. Thus, the differential input stage is the primary component that increases the input signal’s amplitude early in the op‑amp.
Detailed Explanation
The gain stage is the first internal part of an op‑amp that receives the tiny input voltage. Other options are incorrect because A common mistake is to think the output stage does the amplification; Some people think the differential input stage boosts the signal.
Key Concepts
gain stage
output stage
Topic
Internal Components of Op-Amps
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1In a non-linear application of an operational amplifier (op-amp), what occurs when the input signal exceeds the output saturation limits?
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2
Question 2Imagine you are designing a basic audio amplifier using an operational amplifier (op-amp). You need to know how the internal components, specifically the transistors, contribute to the amplification of the audio signal. Which of the following statements best describes the role of the transistors in the op-amp in this context?
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3
Question 3Which of the following statements accurately describe the internal components and function of operational amplifiers (op-amps)? Select all that apply.
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4
Question 4Arrange the following steps in the correct order for understanding the internal functioning of an operational amplifier (op-amp): A) Transistors amplify the input signal, B) The output signal is derived from the difference between the two inputs, C) Feedback mechanisms stabilize the gain, D) Op-amp is powered by a dual supply voltage.
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5
Question 5In a non-linear application of an operational amplifier (op-amp), what occurs when the input signal exceeds the output saturation limits?
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6
Question 6Which internal component of an operational amplifier (op-amp) is primarily responsible for increasing the input signal's amplitude before it reaches the output stage?
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7
Question 7In a non-linear application of an operational amplifier (op-amp), what occurs when the input signal exceeds the output saturation limits?
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8
Question 8Which internal component of an operational amplifier (op-amp) is primarily responsible for increasing the input signal's amplitude before it reaches the output stage?
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9
Question 9Imagine you are designing a basic audio amplifier using an operational amplifier (op-amp). You need to know how the internal components, specifically the transistors, contribute to the amplification of the audio signal. Which of the following statements best describes the role of the transistors in the op-amp in this context?
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