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# TRIANGULAR WAVE GENERATOR.pptx

ECE ii year presentation

ECE ii year presentation

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### TRIANGULAR WAVE GENERATOR.pptx

1. 1. R L AKSHAYA II YEAR ECE – ‘B’ VELAMMAL COLLEGE OF ENGINEERING AND TECHNOLOGY MADURAI GENERATOR
2. 2. A triangular wave generator is an electronic circuit, which generates a triangular wave. An operational amplifier based triangular waveform generator is a simple circuit that is widely used in function generators. The circuit for Triangular wave generator is designed using 741 op amp.
3. 3. SQUARE WAVE GENERATOR CIRCUIT DIAGRAM
4. 4. Square wave output are generated when the op-amp is forced to operate in saturated region that is. The op-amp is forced to swing between +Vsat and –Vsat there by resulting in square wave output. Initially capacitor is equal to zero at the instant when dc supply voltage is +Vcc.+ This means that the voltage at the inverting terminal is zero. Voltage V1 at the non inverting terminal is due to offset output voltage (VOOT) and values of R1,R2 resistors. Thus Vid = V1 (due to inverting terminal) The output (Vo) is feedback to the circuit and will charge to the capacitor connected at the inverting terminal as soon as V2 is greater than V1 the output of the op-amp is switched to negative saturation SQUARE WAVE GENERATOR
5. 5. CIRCUIT DIAGRAM OF TRIANGULAR WAVE GENERATOR
6. 6. Triangular wave generator can be formed by connecting an integrator to the square wave generator. This circuit requires dual op-amp,two capacitor and five resistors. For fix R1,R2,C be frequency of triangular wave depends on R. As value of R is increase or decrease the frequency of triangular wave is increase or decrease. All though the amplitude of square wave form is constant the amplitude of triangular wave will increase or decrease with its frequency. The output of A1 is square wave which is given as an input to A2 as A2 act as an integrator. Its output is triangular wave form. TRIANGULAR WAVE GENERATOR
7. 7. Working of the Op-Amp Based Triangular Wave Generator Let us assume that the capacitor is discharged. This makes the inverting input terminal at a voltage lower compared to the non-inverting input terminal. This is half the supply voltage from the resistor divider network. The output will go high till the capacitor voltage goes above half the supply voltage. At this point, the voltage at the inverting input is greater than the non-inverting input. Afterward, the output will go low and discharge the capacitor. Simultaneously, the 10K resistor acts as hysteresis.  When the output goes low, the voltage divider has a 1K and a 10K in parallel, which decreases the overall resistance and reduces the reference (Vref) voltage. The values of the hysteresis resistor which is 10K and the resistor divider network both can be changed to increase or decrease the frequency. Now the output of the Op-Amp is AC coupled to produce a signal that has an equal positive and negative wave. This signal can easily be amplified.
8. 8. TRIANGULAR WAVE FORM CALCULATION
9. 9. TRIANGULAR WAVE FORM CALCULATION
10. 10. APPLICATION OF ULAR WAVE GENERATOR Sampling circuits Thyristor firing circuits Frequency generator circuits Tone generator circuits