41. Which of the following circuits is (are) linear/digital ICs?
(a) Comparators
(b) Timers
(c) Voltage-controlled oscillators
(d) All of the above
42. What is (are) the level(s) of the input voltage to a ladder-network conversion?
(a) 0
(b) Vref
(c) 0 V or Vref
(d) None of the above
43. A 311 IC is an example of an eight-pin DIP that can be made to function as a ________.
(a) comparator
(b) 555 timer
(c) D to A converter
(d) ladder network
44. Nota
45. The free-running frequency of a 565 FSK decoder is adjusted with ________.
(a) external capacitors
(b) an external resistor
(c) an external RC network
(d) an internal clock
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