Piezotronic analog-to-digital converters based on strain-gated transistors

Abstract

We report a novel approach to achieve piezotronic analog-to-digital converters (ADCs) based on strain gated transistors (SGTs). A single SGT can act as voltage converter, comparator, and amplifier. The new piezotronic ADC devices benefit from high sensitivity of the piezotronic SGT responding to the external strains. This design can significantly reduce the power consumption and the size of these devices, which are considered as crucial factors in self-powered systems. The fundamental concept of the device design has been demonstrated by three piezotronic ADC architectures formed by various networks comprised of SGTs and resistors. Analog-to-digital conversion and logic operations of these piezotronic ADCs blocks are analyzed and logic truth tables for all those configurations are presented. This design has immense potential for enormous applications in future human-machine interfaces, internet of things, and sensor networks.

High performance piezotronic logic nanodevices based on GaN/InN/GaN topological insulator

“…By integrating such logic units in circuits, mechanical-electronic logic operations and complex computations can be realized. Such novel strain-gated logic gates have better performances compared with previously reported piezotronic logic gates 36,37 , such as the ultrahigh ON/OFF ratio and near zero power dissipation. In addition, the conductance sensitivity is also calculated and has the value of approximately 10 5 , an advantage in designing highly sensitivity strain sensor.…”

“…(1). The scattering matrix and wave function are the two typical outputs from KWANT for further calculating the conductance and electron density distribution using Landauer-Buttiker formalism36,37 .…”

Quantum information memory based on reconfigurable topological insulators by piezotronic effect

“…Even in the "111" state, the power dissipation caused by the edge states is very low [48]. For recently proposed piezotronic logic devices based on strain-gated transistors (SGTs), switching on more SGTs requires a large amount of unnecessary energy wasted on those SGTs already in ON state [49]. By contrast, the piezotronic logic signal converter devices based on topological insulator can perfectly overcome this shortcoming.…”

Two-dimensional electron gas in piezotronic devices

“…In the development of flexible electronic devices, taxel-addressable matrices and photon-strain sensor arrays have also been made significant progresses in their chip integration [7,11]. Piezotronic analog-to-digital converters (ADC) based on strain-gated transistors can realize the conversion from mechanical stimulus to digital logic signal [12]. Piezotronic effect on the performance improvement of wavelength and luminescence is studied in ZnO nanowires, CdTe quantum dot and single-layered MoS 2 [13][14][15][16].…”