Abstract
In this work, RFID based sensors are introduced, which means very low-cost sensing nodes and loggers utilizing the hardware and protocols of traditional passive RFID transponders and readers for the short distance wireless sensor readout. Classic frequencies bands include LF ~125kHz, HF ~13.56MHz, and UHF ~900MHz. While HF and UHF off-the-shelf ICs and available IP exist to implement sensor transponders, is not the case of LF. In this work, an ASIC is presented to enhance the reading distance of a semi-active LF sensor transponder up to a few meters. The ASIC includes a 134.2kHz-centered band-pass amplifier, a ~50ms pulse detector, and a HV H-bridge to drive the antenna coil. It was fabricated in a 0.6μm HV-CMOS technology and tested. It was capable to detect the presence of a portable reader, up to a 5m distance, corresponding to an input signal as low as 40μVp in the antenna, with a continuous-time current consumption < 3μA.
| Original language | English |
|---|---|
| Title of host publication | 2020 IEEE 11th Latin American Symposium on Circuits and Systems, LASCAS 2020 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9781728134277 |
| DOIs | |
| State | Published - Feb 2020 |
| Event | 11th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2020 - San Jose, Costa Rica Duration: 25 Feb 2020 → 28 Feb 2020 |
Publication series
| Name | 2020 IEEE 11th Latin American Symposium on Circuits and Systems, LASCAS 2020 |
|---|
Conference
| Conference | 11th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2020 |
|---|---|
| Country/Territory | Costa Rica |
| City | San Jose |
| Period | 25/02/20 → 28/02/20 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 2 Zero Hunger
Keywords
- IoT
- RFID
- active sensor
- low-frequency
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