A Low Voltage Rectifier for Piezo-Electric Energy Harvesting Designed in CMOS Technology

Panigrahi, Antaryami; Sarania, Sanjay; Brahma, Rafwd Gwra

doi:10.1109/devic50843.2021.9455897

Cited by 1 publication

(1 citation statement)

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“…Recent work has been developing dynamic threshold techniques to reduce the threshold voltage effect [11]. Addressing these techniques allows for the reduction of total voltage drop and mitigation of the reverse leakage current in the active stage.…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Threshold Cancellation Technique for a High-Power Conversion Efficiency CMOS Rectifier

Godinho

Yang

Dong

et al. 2021

Sensors

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Power conversion efficiency (PCE) has been one of the key concerns for power management circuits (PMC) due to the low output power of the vibrational energy harvesters. This work reports a dynamic threshold cancellation technique for a high-power conversion efficiency CMOS rectifier. The proposed rectifier consists of two stages, one passive stage with a negative voltage converter, and another stage with an active diode controlled by a threshold cancellation circuit. The former stage conducts the signal full-wave rectification with a voltage drop of 1 mV, whereas the latter reduces the reverse leakage current, consequently enhancing the output power delivered to the ohmic load. As a result, the rectifier can achieve a voltage and power conversion efficiency of over 99% and 90%, respectively, for an input voltage of 0.45 V and for low ohmic loads. The proposed circuit is designed in a standard 130 nm CMOS process and works for an operating frequency range from 800 Hz to 51.2 kHz, which is promising for practical applications.

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Section: Introductionmentioning

confidence: 99%