Power Supply Generation in CMOS Passive UHF RFID Tags

Facen, A.; Boni, Andrea

doi:10.1109/rme.2006.1689889

Cited by 40 publications

(15 citation statements)

References 6 publications

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“…The RF front-end implementing power retrieving, over-voltage protection and backscatter modulation is shown in Fig. 1 and reported in [14]. The chip operates over the UHF RFID bands (860-960 MHz) and exhibits an input sensitivity of -15 dBm which, using a dedicated antenna, guarantee a reading range higher than 5-m with a power level at the reader compatible with the EU regulations.…”

Section: Uhf Rfid Chipmentioning

confidence: 99%

Ultra low-voltage analog circuits for UHF RFID devices in 180 nm CMOS technology

Boni

Facen

2009

Analog Integr Circ Sig Process

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Radio-frequency identification by means of passive tags requires low-cost devices featuring extremely low power consumption for long reading distance and compatibility to small printed antennas. The paper describes the design and implementation of the key analog blocks in a RFID chip: power supply regulator, local oscillator and ASK demodulator. The proposed local oscillator exhibits a very low power consumption and achieves a frequency tolerance compatible with the requirements dictated by the ISO 18000-6 standards. In addition, an ultra-low power voltage reference and a regulator based on a zero-voltage threshold device are presented. These circuits are suitable to provide a regulated power supply to the local oscillator and to the core logic of the passive device. Measurements on a chip implemented in 0.18 lm digital CMOS technology validate the results obtained from simulations.

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Section: Uhf Rfid Chipmentioning

confidence: 99%

Ultra low-voltage analog circuits for UHF RFID devices in 180 nm CMOS technology

Boni

Facen

2009

Analog Integr Circ Sig Process

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“…Figure 4. Rectifier circuit implementation with VTH self-cancellation [3] The input impedance is dominated by the rectifier's parasitic capacitance for Cstore Cpar. The transistors are sized for maximum efficiency and minimum {Z rec }.…”

Section: A Rf Rectifiermentioning

confidence: 99%

“…Gate pre-biasing or trapping charge in floating-gate transistors is another effective concept to increase the wireless range [2], but this often requires external bias voltages and calibration, which makes it impractical and too expensive. An alternative VTH selfcancellation scheme is reported in [3]. This low-cost rectifier shows good performance at low power levels, making it an interesting solution to increase the wireless range.…”

Section: Introductionmentioning

confidence: 99%

A robust and large range optimally mismatched RF energy harvester with resonance control loop

Stoopman

Serdijn

Philips

2012

2012 IEEE International Symposium on Circuits and Systems

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This paper presents the design of a robust and large range RF energy harvester with a control loop. The harvester is based on an optimally mismatched antenna-rectifier interface that offers a large passive voltage boost to increase the sensitivity of the energy harvester while still extracting energy from the antenna. A control loop is proposed that maximizes the voltage on the storage capacitor by keeping the rectifier at resonance during charging continuously. The basic principle of this loop has been implemented and verified with simulations. The loop is able to optimize the antenna-electronics interface for a ±33% change in antenna reactance. A comparison with state-of-theart RF energy harvesters shows major improvements in rectified output voltage at power levels lower than -25 dBm.

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“…The designs presented in (Barnett et al, 2006;Bergeret et al, 2006;Bo et al, 2009;Curty et al, 2005;Facen & Boni, 2006;Karthaus & Fischer, 2003) provide details on specific implementations of this type of circuit. It is worth noting that the designs in (Barnett et al, 2006;Facen & Boni, 2006) contain additional rectification circuitry in front of the charge pump circuitry. As mentioned in the previous section, an RFID tag communicates with an RFID reader by modulating the RF signal transmitted by the RFID reader.…”

Section: Fig 1 Example Charge Pumpmentioning

confidence: 99%

“…Because of these issues, there has been at least one proposed RFID IC design that dispenses with ESD protection altogether (Curty et al, 2005). However, this practice not standard, and most RFID ICs will have ESD protection circuitry similar to that shown in (Facen & Boni, 2006).…”

Section: Fig 1 Example Charge Pumpmentioning

confidence: 99%