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 15a. 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.