Analog Electronics - GATE practice papers - Electronics & Communication for Q. 510

Q.  What kind of current sources are applicable for replacing large resistors so as to  prevent them from occupying copious areas on IC chip in the voltage regulator circuits? (Marks : 02)
- Published on 19 Oct 15

a. Simple Current Sources
b. Widlar Current Sources
c. Wilson Current Sources
d. Mirror Current Sources

ANSWER: Widlar Current Sources
 
Generally, it is mandatory for large resistors to maintain small currents of few micro ampere. Therefore, large areas are occupied by these large resistors on the IC chip. However, Widler current sources are preferred for replacing these large resistors.

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