A 130-nm CMOS Dual Input-Polarity DC–DC Converter for Low-Power Applications

Gatti, Alberto; Spiazzi, G.; Gerosa, A.; Neviani, A.; Bevilacqua, Andrea

doi:10.1109/lssc.2019.2932850

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…At the same time, large dynamic currents can be provided, since signals are capacitively coupled to the high impedance gate node. Due to these advantages, QFG transistors have found widespread use in the design of amplifiers but also in high-performance current mirrors [31][32][33][34][35], mixers [36,37], linearization of active resistors [38,39], DC offset cancellation servo loop circuits [40], bootstrapped switches [5], current conveyors [30,[41][42][43], Voltage Feedback Operational Amplifiers (VFOAs) [44], Current Feedback Operational Amplifiers (CFOAs) [45], buffers [46][47][48][49][50][51], rectifiers [35,52], capacitance multipliers [35], transconductors [30,[53][54][55], digital-based analog circuits [56], DC-DC converters [57], continuous-time filters [58][59][60][61], track and hold circuits [5], data converters [5,62], capacitive sensing interfaces [63], particle detectors [23] and retinal prosthesis [64], to name some representative applications.…”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient Amplifiers Based on Quasi-Floating Gate Techniques

et al. 2021

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Energy efficiency is a key requirement in the design of amplifiers for modern wireless applications. The use of quasi-floating gate (QFG) transistors is a very convenient approach to achieve such energy efficiency. We illustrate different QFG circuit design techniques aimed to implement low-voltage, energy-efficient class AB amplifiers. A new super class AB QFG amplifier is presented as a design example, including some of the techniques described. The amplifier has been fabricated in a 130 nm CMOS test chip prototype. Measurement results confirm that low-voltage, ultra-low-power amplifiers can be designed, preserving, at the same time, excellent small-signal and large-signal performance.

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Section: Introductionmentioning

confidence: 99%

Energy-Efficient Amplifiers Based on Quasi-Floating Gate Techniques

et al. 2021

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“…For autonomy, it is important that the converter can start up without the need of an external supply such as a battery. Systems with a single inductor [4,5] cannot start up at very low voltages and are not suitable for many autonomous low-power applications. All presently available systems which can start up from voltages below 100 mV are based on an oscillator with a transformer and a transistor with very low threshold voltage such as a native or depletion transistor or JFET (starting transistor).…”

Section: Introductionmentioning

confidence: 99%

A Bipolar ±13 mV Self-Starting and 85% Peak Efficiency DC/DC Converter for Thermoelectric Energy Harvesting

Dillersberger

Deutschmann

Tham³

2020

Energies

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This paper presents a novel converter for boosting the low-voltage output of thermoelectric energy harvesters to power standard electronic circuits. The converter can start up from a fully depleted state of the system off a bipolar ±13 mV input and can boost it to output voltages of up to 5 V. The converter comprises two transformers, one for each polarity that are multiplexed between an oscillator (used during startup) and a flyback converter (used during normal operation). To eliminate leakage currents in the input stage, the unused converter is completely turned off at startup and both converters are automatically shut off if the input power is found to be too low. Measurement results of the converter designed in a 180 nm CMOS process demonstrate a peak end-to-end conversion efficiency of 85% and nearly perfect impedance matching over the full input voltage range. This is the first time that a converter for ultra-low bipolar input voltages achieves the same performance as a unipolar converter.

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