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Which of the following voltage regulator IC gives a variable positive voltage?

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in Biomedical Instrumentation by (76.6k points)
Which of the following voltage regulator IC gives a variable positive voltage?

(a) LM317

(b) LM337

(c) 7805

(d) 7812

The question was posed to me during an internship interview.

I would like to ask this question from General Considerations for Signal Conditioners topic in chapter Recording System of Biomedical Instrumentation

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Correct choice is (a) LM317

For explanation: LM317 is a variable positive voltage regulator IC. It is capable of drawing current up to 1.5A and voltage range from 1.25V- 30V ideally. LM337 is a variable negative voltage regulator IC. 7805 and 7812 are fixed voltage regulator IC that give output voltage as 5V and 12V respectively.

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