A 433-MHz Wireless Burst-Chirp Modulation Transmitter with Adaptive Duty-Cycle Control and Precharge Mechanism

Jing Siang Chen, Chun Ting Chang, Yu Te Liao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper presents an energy-efficient 433 MHz wireless transmitter with burst-chirp modulation. To compromise the design trade-offs between output power and power consumption, the transmitter (TX) adopts a duty-cycle controlled class-E power amplifier (PA), whose switching duty-cycle ratio is less than 50%. Through this method, the impedance transformation ratio at the output of the PA is reduced, thus improving efficiency. Furthermore, a digital controller directly modulates the oscillator, generating chirp pulses. Moreover, the precharge mechanism is proposed to improve settling time, allowing short-pulse data transmission time. The TX IC is fabricated using 180-nm CMOS technology and occupies an active area of 1.73 mm2. The design achieves 8.71/Mbit normalized system efficiency, while the output power is -1.18 dBm at a 0.8-V supply, and the maximum system efficiency is 45%.

Original languageEnglish
Title of host publicationESSCIRC 2022 - IEEE 48th European Solid State Circuits Conference, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages313-316
Number of pages4
ISBN (Electronic)9781665484947
DOIs
StatePublished - 2022
Event48th IEEE European Solid State Circuits Conference, ESSCIRC 2022 - Milan, Italy
Duration: 19 Sep 202222 Sep 2022

Publication series

NameESSCIRC 2022 - IEEE 48th European Solid State Circuits Conference, Proceedings

Conference

Conference48th IEEE European Solid State Circuits Conference, ESSCIRC 2022
Country/TerritoryItaly
CityMilan
Period19/09/2222/09/22

Keywords

  • burst-chirp modulation
  • CMOS
  • duty-cycle control loop
  • power amplifier
  • power-efficient
  • transmitter

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