Pulse width Modulation is the important concept in the field of analog electronics. It has various applications and it is not limited to one particular field. Let it be Communication systems or Power electronics or Microcontrollers.
Pulse width modulation is used everywhere.So for a electronics/electrical engineer it is very essential to understand the concept.
Pulse width modulation , as the name suggests, is a technique in which the output pulse width is varied depending on a input signal.
let's go ahead and study simple pulse width modulation
Circuit
Pulse width modulation is used everywhere.So for a electronics/electrical engineer it is very essential to understand the concept.
Pulse width modulation , as the name suggests, is a technique in which the output pulse width is varied depending on a input signal.
let's go ahead and study simple pulse width modulation
Circuit
The circuit consists of triangular wave generator and a comparator.The inputs to the comparator are
1)triangular wave
2) constant Dc voltage
Refer this tutorial for generation of triangular wave : TRIANGUAR WAVE
The comparator is nothing about Opamp without feedback. So without feedback ,Opamp output will be Positive or negative saturation depending on the value of voltages at Inverting and Non inverting terminals.
Two cases
1) IF noninverting terminal voltage is greater than inverting terminal, output will be in positive saturation
2)IF noninverting terminal voltage is less than inverting terminal, output will be in negative saturation
So depending on the value of DC voltage, the Pulse width of the square wave is varied. Hence the name Pulse width modulation.
