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An Impulse Radio PWM-Based Wireless Data Acquisition Sensor Interface.

Jaemyung Lim1, Ahmad Rezvanitabar1, F Levent Degertekin2

  • 1GT-Bionics lab, School of Electrical and Computer Engineering, Atlanta, GA, USA.

IEEE Sensors Journal
|October 2, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a low-power wireless data acquisition system using impulse radio pulse width modulation (IR-PWM) for compact devices. The novel circuit achieves high throughput, enabling efficient data capture under strict size and power limitations.

Keywords:
Pulse width modulationimpulse radiowideband communicationwireless data acquisition

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Area of Science:

  • Electrical Engineering
  • Integrated Circuit Design
  • Wireless Communication

Background:

  • Wireless data acquisition systems (wDAQ) face challenges with size and power constraints.
  • High throughput and low power consumption are critical for modern sensor interfaces.

Purpose of the Study:

  • To develop a novel sensor interface circuit for low-power, high-throughput wDAQ systems.
  • To address extreme size and power constraints in wireless data acquisition.

Main Methods:

  • Utilized impulse radio pulse width modulation (IR-PWM) for signal encoding.
  • Employed triple-slope analog-to-time converters (ATC) and an all-digital power amplifier (PA) for transmission.
  • Implemented an RF-LNA, envelope detector, and T-flipflop for signal reception, followed by a time-to-digital converter (TDC).

Main Results:

  • A proof-of-concept prototype was fabricated in a 0.18-μm HV CMOS process, occupying 0.18 mm² and consuming 3.94 mW.
  • The prototype achieved a 7-bit resolution with its TDC.
  • The complete wDAQ system demonstrated 5.8 effective number of bits (ENOB) at 2 × 10 MS/s.

Conclusions:

  • The proposed IR-PWM sensor interface circuit effectively meets low power and high throughput requirements for constrained wDAQ systems.
  • The design offers a viable solution for compact wireless sensing applications, such as capacitive micromachined ultrasound transducer (CMUT) imaging.