A strategy to improve the charge pump voltage conversion ratio for RFID passive tag

Salehi, Mohammad Reza; Dastanian, Rezvan; Abiri, Ebrahim; Akbari, Akram

doi:10.1080/21681724.2015.1036798

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…However, it is difficult to implement oxide TFTs integrated DC-DC converter with current technology, such as complementary metal-oxide-semiconductor (CMOS) technology [4] and zero threshold voltage (V TH ) technology [5]. There are mainly three issues to be addressed.…”

Section: Introductionmentioning

confidence: 99%

P‐108: Oxide Thin Film Transistors Integrated DC‐DC Converter with High Efficiency for Passive RFID Tag

Lei

Liao

Huang

et al. 2019

Symp Digest of Tech Papers

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In this work we present a DC-DC converter based on metal oxide thin film transistors (TFTs) for passive radio frequency identification (RFID) tags. To increase the voltage conversion ratio, the cross-coupled structure with positive feedback from adjacent stages is proposed. Compared with conventional DC-DC converter with separation block, the proposed circuit features the decreased threshold voltage drop, the reduced on-resistance of switch transistor, the improved driving capability and the increased power efficiency. The simulated results reveal that the output voltage and maximum power efficiency for proposed twostage DC-DC converter are 16.6 V and 52% at a output current of 550 μA, which are 12.6 V and 42% at a output current of 250 μA for conventional designs.

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Section: Introductionmentioning

confidence: 99%

P‐108: Oxide Thin Film Transistors Integrated DC‐DC Converter with High Efficiency for Passive RFID Tag

Lei

Liao

Huang

et al. 2019

Symp Digest of Tech Papers

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Fast-Transient-Response Low-Voltage Integrated, Interleaved DC–DC Converter for Implantable Devices

Shirazi

Jannesari

Torkzadeh

2019

J CIRCUIT SYST COMP

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A new self-start-up switched-capacitor charge pump is proposed for low-power, low-voltage and battery-less implantable applications. To minimize output voltage ripple and improve transient response, interleaving regulation technique is applied to a multi-stage Cross-Coupled Charge Pump (CCCP) circuit. It splits the power flow in a time-sequenced manner. Three cases of study are designed and investigated with body-biasing technique by auxiliary transistors: Four-stage Two-Branch CCCP (TBCCCP), the two-cell four-stage Interleaved Two-Branch CCCP (ITBCCCP2) and four-cell four-stage Interleaved Two-Branch CCCP (ITBCCCP4). Multi-phase nonoverlap clock generator circuit with body-biasing technique is also proposed which can operate at voltages as low as CCCP circuits. The proposed circuits are designed with input voltage as low as 300 to 400[Formula: see text]mV and 20[Formula: see text]MHz clock frequency for 1[Formula: see text]pF load capacitance. Among the three designs, ITBCCCP4 has the lowest ramp-up time (41.6% faster), output voltage ripple (29% less) and power consumption (19% less). The Figure-Of-Merit (FOM) of ITBCCCP4 is the highest value among two others. For 400[Formula: see text]mV input voltage, ITBCCCP4 has a 98.3% pumping efficiency within 11.6[Formula: see text][Formula: see text]s, while having a maximum voltage ripple of 0.1% and a power consumption as low as 2.7[Formula: see text]nW. The FOM is 0.66 for this circuit. The designed circuits are implemented in 180-nm standard CMOS technology with an effective chip area of [Formula: see text][Formula: see text][Formula: see text]m for TBCCCP, [Formula: see text][Formula: see text][Formula: see text]m for ITBCCCP2 and [Formula: see text][Formula: see text][Formula: see text]m for ITBCCCP4.

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Design an optimized rectifier with TLBO based on threshold voltage cancellation technique

Dastanian

Abiri

Ghasempour

2019

IFS

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A strategy to improve the charge pump voltage conversion ratio for RFID passive tag

Cited by 3 publications

References 9 publications

P‐108: Oxide Thin Film Transistors Integrated DC‐DC Converter with High Efficiency for Passive RFID Tag

P‐108: Oxide Thin Film Transistors Integrated DC‐DC Converter with High Efficiency for Passive RFID Tag

Fast-Transient-Response Low-Voltage Integrated, Interleaved DC–DC Converter for Implantable Devices

Design an optimized rectifier with TLBO based on threshold voltage cancellation technique

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