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Which of the following voltage regulator IC gives a variable positive voltage?(a) LM317(b) LM337(c) 7805(d) 7812The 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

Answer»

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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