Page 20 - Template EBook Kita (A4 Document)

TOPIC 1: INTRODUCTION TO 555 TIMER

2. State the function for Comparator 1 and Comparator 2 in figure below:

Comparator 1

Comparator 2

Answer:

Comparator 1 :
The inputs to the upper comparator or the threshold comparator are the

threshold pin connected to the non-inverting input (+), and a reference

voltage of 2/3 Vcc is connected to the inverting input (-) of the

comparator.

Comparator 2:
For the lower comparator or the trigger comparator, 1/3 Vcc reference

voltage is given to the non-inverting input (+) and the trigger pin is

connected to the inverting input (-) of the comparator.

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