ICTACT Journal on Microelectronics

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PULSE WIDTH MODULATOR USING OTRA BASED TIMER CIRCUIT


Affiliations
1 Department of Electronics and Communication Engineering, Indira Gandhi Engineering College., India
2 4Department of Electronics and Communication Engineering, Madhav Institute of Technology and Science., India
     

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This paper proposes a modified PWM circuit using OTRA based analog timer circuit. Designing a pulse width modulator circuit by employing the proposed analog timer circuit results in a waveform having variable duty cycle and time period. The timer circuit consists of comparators designed using OTRA and flip flops. The fabrication of timer circuit on a monolithic integrated circuit is easier as the carrier signal type is exponential and no additional circuitry is needed unlike for triangular and sawtooth pulses. The process parameters of 0.5 µm CMOS have been used for performing an intensive simulation of the proposed PWM circuit.

Keywords

Timer Circuit, Pulse Width Modulator (PWM), OTRA, Flip-Flop
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  • PULSE WIDTH MODULATOR USING OTRA BASED TIMER CIRCUIT

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Authors

Dheeraj Singh Rajput
Department of Electronics and Communication Engineering, Indira Gandhi Engineering College., India
Ritu Gupta
Department of Electronics and Communication Engineering, Indira Gandhi Engineering College., India
Sankalp Shukla
Department of Electronics and Communication Engineering, Indira Gandhi Engineering College., India
Deep Kishore Parsediya
4Department of Electronics and Communication Engineering, Madhav Institute of Technology and Science., India

Abstract


This paper proposes a modified PWM circuit using OTRA based analog timer circuit. Designing a pulse width modulator circuit by employing the proposed analog timer circuit results in a waveform having variable duty cycle and time period. The timer circuit consists of comparators designed using OTRA and flip flops. The fabrication of timer circuit on a monolithic integrated circuit is easier as the carrier signal type is exponential and no additional circuitry is needed unlike for triangular and sawtooth pulses. The process parameters of 0.5 µm CMOS have been used for performing an intensive simulation of the proposed PWM circuit.

Keywords


Timer Circuit, Pulse Width Modulator (PWM), OTRA, Flip-Flop

References