A Pulse Width Modulator Using a High-Speed Comparator with Flexible Oxide TFT Technology

Suyash Shrivastava; Pydi Ganga Bahubalindruni; João Goes

doi:10.1109/LSSC.2022.3228072

A Pulse Width Modulator Using a High-Speed Comparator with Flexible Oxide TFT Technology

Suyash Shrivastava, Pydi Ganga Bahubalindruni, João Goes

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

This letter presents a pulse-width modulator (PWM) using a novel high-speed comparator, whose duty cycle changes with respect to the variation in the input reference voltage. This circuit has shown a variation of 44% in the duty cycle of a PWM wave for an input reference voltage variation of 2 V from measurements. This circuit is showing an input referred offset voltage of 40 mV, an input rms noise voltage of 4 mV and a power consumption of 56 μW. Further, the circuit is able to discriminate a minimum differential input voltage of 40 mV. The reliable operation was demonstrated with a maximum input signal frequency of 10 kHz and a clock frequency of up to 1 MHz at a supply voltage of 4 V under normal ambient conditions. This circuit was fabricated on a flexible 30- μm thick polyamide substrate using an a-IGZO TFT technology.

Original language	English
Pages (from-to)	288-291
Number of pages	4
Journal	IEEE Solid-State Circuits Letters
Volume	5
DOIs	https://doi.org/10.1109/LSSC.2022.3228072
Publication status	Published - Dec 2022

Keywords

Comparator
flexible electronics
oxide TFT
pulse-width modulator (PWM) modulator

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10.1109/LSSC.2022.3228072

Cite this

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title = "A Pulse Width Modulator Using a High-Speed Comparator with Flexible Oxide TFT Technology",

abstract = "This letter presents a pulse-width modulator (PWM) using a novel high-speed comparator, whose duty cycle changes with respect to the variation in the input reference voltage. This circuit has shown a variation of 44% in the duty cycle of a PWM wave for an input reference voltage variation of 2 V from measurements. This circuit is showing an input referred offset voltage of 40 mV, an input rms noise voltage of 4 mV and a power consumption of 56 μW. Further, the circuit is able to discriminate a minimum differential input voltage of 40 mV. The reliable operation was demonstrated with a maximum input signal frequency of 10 kHz and a clock frequency of up to 1 MHz at a supply voltage of 4 V under normal ambient conditions. This circuit was fabricated on a flexible 30- μm thick polyamide substrate using an a-IGZO TFT technology.",

keywords = "Comparator, flexible electronics, oxide TFT, pulse-width modulator (PWM) modulator",

author = "Suyash Shrivastava and Bahubalindruni, {Pydi Ganga} and Jo{\~a}o Goes",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE. This work was supported in part by SERB Power Fellowship under Project SPF/2021/000018, and in part by IISER Bhopal. This article was approved by Associate Editor Patrick P. Mercier.",

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AU - Shrivastava, Suyash

AU - Bahubalindruni, Pydi Ganga

AU - Goes, João

N1 - Publisher Copyright: © 2018 IEEE. This work was supported in part by SERB Power Fellowship under Project SPF/2021/000018, and in part by IISER Bhopal. This article was approved by Associate Editor Patrick P. Mercier.

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N2 - This letter presents a pulse-width modulator (PWM) using a novel high-speed comparator, whose duty cycle changes with respect to the variation in the input reference voltage. This circuit has shown a variation of 44% in the duty cycle of a PWM wave for an input reference voltage variation of 2 V from measurements. This circuit is showing an input referred offset voltage of 40 mV, an input rms noise voltage of 4 mV and a power consumption of 56 μW. Further, the circuit is able to discriminate a minimum differential input voltage of 40 mV. The reliable operation was demonstrated with a maximum input signal frequency of 10 kHz and a clock frequency of up to 1 MHz at a supply voltage of 4 V under normal ambient conditions. This circuit was fabricated on a flexible 30- μm thick polyamide substrate using an a-IGZO TFT technology.

AB - This letter presents a pulse-width modulator (PWM) using a novel high-speed comparator, whose duty cycle changes with respect to the variation in the input reference voltage. This circuit has shown a variation of 44% in the duty cycle of a PWM wave for an input reference voltage variation of 2 V from measurements. This circuit is showing an input referred offset voltage of 40 mV, an input rms noise voltage of 4 mV and a power consumption of 56 μW. Further, the circuit is able to discriminate a minimum differential input voltage of 40 mV. The reliable operation was demonstrated with a maximum input signal frequency of 10 kHz and a clock frequency of up to 1 MHz at a supply voltage of 4 V under normal ambient conditions. This circuit was fabricated on a flexible 30- μm thick polyamide substrate using an a-IGZO TFT technology.

KW - Comparator

KW - flexible electronics

KW - oxide TFT

KW - pulse-width modulator (PWM) modulator

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EP - 291

JO - IEEE Solid-State Circuits Letters

JF - IEEE Solid-State Circuits Letters

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A Pulse Width Modulator Using a High-Speed Comparator with Flexible Oxide TFT Technology

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Keywords

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