Pulse Position Modulation Circuit
This is the circuit used for performing Pulse Position Modulation , the circuit diagram is given below and we will study how it worked:
Pulse Position Modulation Circuit
The circuit diagram of PPM involves IC 555 timer as a major component. All other components include resistors R1 and R2, Capacitors like C1 & C2, and diode D1.
We can define IC 555 as a monolithic IC consisting of a package of 8 pins. Triangle waves, square waves, etc. are used in many applications depending on how the IC is being used. It is used as an unstable multivibrator and a bistable multivibrator to create different waveforms. Therefore, PPM production is also considered as one of the applications of IC 555.
Let’s dive deeper into generation of PPM signal using the PPM circuit of the above 555 IC. The 555 timer operates in monostable mode to generate PWM pulses and PPM pulses. It is a monostable type multivibrator. Multivibrators can be described as electronic devices that generally do not have one or two stable states. Depending on the steady state multivibrators can be divided into three types: astable, bistable and monostable.
The input PWM pulse is fed to pin 2 of the class 555 IC trigger input through the differential network consisting of diode D1, resistor R and capacitor C1. Now, since the input is taken at pin 2, the output will be taken at pin 3 of the 555 timer IC. The output will remain high for a period of time determined by resistors R2 and C2, keeping the width and amplitude of each pulse constant and thereby we will get a PPM signal at the output.
This is how 555 timer integrated is used to generate PPM signal.
Pulse Position Modulation (PPM)
Pulse Position Modulation is another kind of important modulation technique used in electronics communication system apart from amplitude and phase modulation. In this article, we will discuss what is pulse position modulation, we will understand its block-diagram and how do we detect pulse position modulation. Later we will understand the working of pulse position modulation through its circuit diagram. We will discuss the advantages, disadvantages and applications of this modulation technique. In the end, we will conclude the article.
Table of Content
- What is Pulse Position Modulation ?
- Pulse Position Modulation Block Diagram
- Detection of Pulse Position Modulation
- Working of Pulse Position Modulation
- Pulse Position Modulation Circuit
- Advantages of Pulse Position Modulation
- Disadvantages of Pulse Position Modulation
- Applications of Pulse Position Modulation