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Topic presentation on:-SAWTOOTH WAVE FORM GENERATOR

Presented by:- AMIT KUMAR (EEE/14/1103LALIT BALAYAN (EEE/14/1104)NITISH KUMAR (EEE/14/1105)

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Importance of BRIDGE COURSE?The bridge course improve our thinking and knowledge

skill on a particular point Technically .By The bridge course our technical skill will increase.The bridge course give a platform to research something

different from the general technical knowledge.

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Introduction

What is sawtooth wave?Difference between sawtooth wave and triangular wave.General circuit diagram of sawtooth wave form generator.Basic components used in sawtooth wave form generator.Working process of circuit.Application of sawtooth wave form.

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What is sawtooth wave?Saw tooth waveform is a type of linear non sinusoidal

waveform with a triangular shape in which the rise time and fall time are different.

Fig.1 Sawtooth waveform

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Difference between Sawtooth wave and Triangular wave.

Saw tooth waveform: - Saw tooth waveform is a type of linear non sinusoidal waveform with a triangular shape in which the rise time and fall time are different.

Triangular waveform:-A pure triangular waveform is also linear, non sinusoidal and have a triangular shape but it has equal rise and fall times. The saw tooth waveform can also be called an asymmetric triangular wave.

Fig.2 Sawtooth waveform Fig.3 Triangular waveform

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General circuit diagram of sawtooth wave form generator.

Fig .4 Simple sawtooth waveform generator

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Basic components used in Sawtooth wave form generator.IC 7404 (Hex Inverter)- Used for frequencies up to 100 k HZ Transistor (BF192/BF494)

Used to amplify and switch electronic signals and electrical power.

Capacitor 4.7µF(10V) Resistor 22kΩConnecting wire- Use to connect the circuit elements and

for input & output.

The frequency can be changed by changing the product of RC

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Working process of circuit.Let us suppose the input of gate 1 is at logic ‘0’ state and

output of gate 3 and 4 are at ‘1’ and ‘0’ respectively. The transistor T1 is off and capacitor C gets charged through R.

When it is charge to a voltage equal to logic ‘1’, than all gate output change and T1 is ‘on’, resulting in quick discharge of stored charge in C through it. So, the input voltage of gate 1 becomes ‘0’ again and the next cycle starts.

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Application of sawtooth wave form.Sawtooth waves are known for their use in music. The sawtooth

and square waves are common starting points used to create sounds with subtractive analog and virtual analog music synthesizers.

The sawtooth wave is the form of the vertical and horizontal deflection signals used to generate a raster on CRT-based television or monitor screens. Oscilloscopes also use a sawtooth wave for their horizontal deflection, though they typically use electrostatic deflection.

The first television receivers had controls allowing users to adjust the picture's vertical or horizontal linearity. Such controls were not present on later sets as the stability of electronic components had improved.

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CONCLUSIONA sawtooth can be constructed using additive synthesis.

The infinite Fourier series

converges to a reverse (inverse) sawtooth wave. A conventional sawtooth can be constructed using

Where A is amplitude, k such that the highest harmonic

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Example

ANIMATION OF THE ADDITIVE SYNTHESIS OF A SAWTOOTH WAVE WITH AN INCREASING NUMBER OF

HARMONICS

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Any query?

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THANK YOU