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________ IC is a variable negative voltage regulator.(a) 7912(b) 7905(c) LM337(d) LM317I have been asked this question by my school principal while I was bunking the class.Origin of the question is General Considerations for Signal Conditioners topic in portion Recording System of Biomedical Instrumentation

Answer»

The CORRECT answer is (C) LM337

Easiest explanation: LM337 is a VARIABLE negative voltage regulator IC. It is CAPABLE of drawing CURRENT up to 1.5A and voltage range from (-1.25V) – (-30V) ideally. LM317 is a variable positive voltage regulator IC. 7905 and 7912 are fixed voltage regulator IC that give output voltage as -5V and -12V respectively.



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