CMOS temperature sensor using a current starved ring oscillator for low power and low leakage IOT applications

Das, Arindam; Prasad, Rajendra; Mohita,; Mondal, Arijoy; Ranjan, Kumar Rajiv

doi:10.1109/iementech.2017.8076963

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…As shown in Fig. 4, M n3 -M n5 and M p2 -M p4 work as active loads to control the operating current of the oscillator circuit [32]. M n6 -M n6 and M p5 -M p7 are three inverters in ring.…”

Section: Circuit Designmentioning

confidence: 99%

A CMOS bandgap reference based on switched capacitor with temperature compensation method

Ran

Chen

Wang

et al. 2022

IEICE Electron. Express

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A CMOS bandgap reference based on switched capacitor is proposed in this paper. Temperature compensation is adopted to achieve better temperature coefficient (TC). Two first order compensated reference voltages are combined to realize a new reference voltage with lower TC. Due to the switched capacitor operation, power and area of circuit are reduced. Simulation result shows that the bandgap reference achieves TC of 14.5 ppm/ • C from −40 • C to 120 • C. Bandgap reference output voltage is 235 mV with a ripple voltage of 700 µV.

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“…As shown in Fig. 4, M n3 -M n5 and M p2 -M p4 work as active loads to control the operating current of the oscillator circuit [32]. M n6 -M n6 and M p5 -M p7 are three inverters in ring.…”

Section: Circuit Designmentioning

confidence: 99%

A CMOS bandgap reference based on switched capacitor with temperature compensation method

Ran

Chen

Wang

et al. 2022

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…Its areas of application include wireless sensor network [44], wireless body network [45], and wireless charger network [46]. Example of feasible applications for RF energy harvester include wireless sensor node which has an estimated power consumption of 1 -100 µW [102], temperature sensor which consumes 3.75 pW -0.15 µW [103]- [104], hearing aid which consumes 38 µW [105], and heart rate variability detector which consumes 3 µW [106]. The main objective of this research is to propose an RF energy harvesting circuit which operates over wide input power range.…”

Section: Wireless Power Transfermentioning

confidence: 99%

Power management in energy harvesting

Lau¹

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A dual-path wide-power-range rectifier for RF energy harvesting is presented in this thesis. The proposed idea focuses on maximizing efficiency in harvesting energy from the surrounding environment and designated energy source to support wide variety of applications in low power devices' wireless charging. The harvester consists of a low-power rectifier, a high-power rectifier and a voltageaware block. In the low-power rectifier, novel DC-boosted gate bias technique is proposed to enhance power conversion efficiency (PCE) by improving forward peak current, reducing diode forward voltage drop and suppressing reverse leakage current. A novel internal body-biasing technique is proposed in the highpower rectifier to regulate the transistors' threshold voltage (V th ) for optimal efficiency. A voltage-aware block, which consists of a voltage detector, a switch and an adjustable-offset comparator, has been incorporated into the high-power rectification path to minimize overall power consumption.The proposed circuit is fabricated in 65 nm 6M/1P standard CMOS technology.Peak PCE of 70.4% is measured on the low-power rectifier with -5.5 dBm input power at 2.45 GHz when driving a 15 kΩ load. For high-power rectifier, peak PCE of 56.6% is measured with 1.3 dBm input power at 2.45 GHz when driving a 15 kΩ load. The chip has PCE higher than 20% over a 19.8 dB of extended input power range from -13.5 dBm to 6.3 dBm.

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