An impulse radio PWM-based wireless data acquisition sensor interface
- Authors
- Lim, Jaemyung; Rezvanitabar, Ahmad; Degertekin, E. Levent; Ghovanloo, Maysam
- Issue Date
- Jan-2019
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Pulse width modulation; impulse radio; wireless data acquisition; wideband communication
- Citation
- IEEE SENSORS JOURNAL, v.19, no.2, pp.603 - 614
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE SENSORS JOURNAL
- Volume
- 19
- Number
- 2
- Start Page
- 603
- End Page
- 614
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/191487
- DOI
- 10.1109/JSEN.2018.2877889
- ISSN
- 1530-437X
- Abstract
- A sensor interface circuit based on impulse radio pulse width modulation (IR-PWM) is presented for low power and high throughput wireless data acquisition systems (wDAQ) with extreme size and power constraints. Two triple-slope analog-to-time converters (ATC) convert two analog signals, each up to 5 MHz in bandwidth, into PWM signals, and an IR transmitter with an all-digital power amplifier combines them while preserving the timing information by transmitting impulses at the PWM rising and falling edges. On the receiver side, an RF-LNA followed by an envelope detector recovers the incoming impulses, and a T-fiipflop reverts the impulse sequence back to PWM to be digitized by a time-to-digital converter (TDC). Detailed analysis and design guideline on ATC was introduced, and a proof-ofconcept prototype was fabricated for a capacitive micromachined ultrasound transducer imaging system in a 0.18-mu m HV CMOS process, occupying 0.18 mm(2) active area and consuming 3.94 mW from a 1.8 V supply. The proposed TDC in this prototype yielded 7-bit resolution, while the entire wDAQ achieved 5.8 effective n umber of bits at 2 x 10 MS/s.
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