Digital LDO is proposed to provide the low noise and tunable power supply voltage 0.5-V near-threshold logic circuits. Because conventional feedback-controlled by operational amplifier fail operate at 0.5V, digital eliminates all analog circuits controlled circuits, which enables operation. The developed in 65nm CMOS achieved input 0.45-V output with 98.7% current efficiency 2.7-μA quiescent 200-μA load current. Both are lowest values published LDO's, indicates good energy of

A low-power high-speed chip-to-chip interface scheme is described having a density of 625pins/mm/sup 2/. The utilizes capacitively coupled contactless minipads, return-to-half-V/sub 00/ signaling and sense amplifying F/F. measured test chip fabricated in 0.35/spl mu/m CMOS delivers up to 1.27Gb/s/pin at 3mW/pin.

A shoe insole pedometer, which consists of a piezoelectric energy harvester and 2 V organic pedometer circuit, has been developed as first step toward the application flexible large-area harvesting. pseudo-CMOS 14 bit counter records number steps up to 16383 using harvested power. To increase noise margin logic circuits, negative voltage is generated by an charge pump circuit applied inverters transmission gates in flip-flops counter. Schmitt trigger inverter used feed clean square pulses...

This paper presents a 0.6 V input, 0.3-0.55 output buck converter in 40 nm CMOS, for low-voltage low-power wireless sensor network systems. A low power CCM/DCM controller of the enables automatic selection DCM or CCM operation depending on load situation, therefore improving efficiency. dual-mode-body-biased (DMBB) zero-crossing detector with both forward body bias mode and zero is designed to enable supply voltage normal voltage. An ultra-low-power hysteresis proposed modes selection. The...

A 64-channel surface electromyogram (EMG) measurement sheet (SEMS) with 2 V organic transistors on a 1 μm-thick ultra-flexible polyethylene naphthalate (PEN) film is developed for prosthetic hand control. The EMG electrodes must satisfy the following three requirements; high mechanical flexibility, electrode density and signal integrity. To achieve integrity, distributed shared amplifier (DSA) architecture proposed, which enables an in-situ amplification of myoelectric fourfold increase in...

Thanks to the extraordinary advances flexible electronics have experienced over last decades, applications such as conformable active-matrix displays, ubiquitously integrated disposable sensor nodes, wearable or textile-integrated systems, well imperceptible and transient implants are now reachable. To enable these applications, specialized analog circuits able transmit receive data, condition sensors' parameters, drive actuators control powering devices required. High-performance...

This letter presents a compact model for flexible analog/RF circuits design with amorphous indium-gallium-zinc oxide thin-film transistors (TFTs). The is based on the MOSFET LEVEL=3 SPICE template, where parameters are fitted to measurements both dc and ac characteristics. proposed TFT shows good scalability of drain current device channel lengths ranging from 50 3.6 μm. validated by comparing simulations various amplifier circuits. These include two-stage cascode showing 10 dB voltage gain...

Decreasing power consumption is the key design issue of SSDs. A typical SSD consists more than 16 NAND Flash memories, DRAMs and a controller. Since write performance 10MB/s [1,2], to raise speed level HDD, 100MB/s, 8 or chips in are simultaneously programmed. As feature size decreases, total bitline capacitance chip increases beyond 200nF. If operate parallel, large current 800mA flows charge sub-30nm [3]. good strategy decrease lowering supply voltage, V <inf...

The analog T-switch (AT-switch) scheme is introduced to suppress subthreshold-leakage problems in charge-based circuits such as switched capacitors and sample-and-hold circuits. A 0.5-V sigma-delta modulator manufactured a 0.15-/spl mu/m FD-SOI process with low V/sub TH/ of 0.1 V using the concept. compared another leakage-suppression based on super cut-off CMOS (SCCMOS) conventional circuit which are also fabricated. AT-switch greatly improves 8.1-dB SNDR through reducing nonlinear leakage...

A magnetically resonant wireless power transmission sheet (WPTS) on a printed circuit board is developed. WPTS wirelessly supplies the to electronic devices including wearable healthcare anywhere with high efficiency. In order increase efficiency degraded by misalignment of receiver coil, transmitter coil array and proposed staggered repeater (SRCA) are stacked in WPTS. One closest surrounding four coils selectively activated based result position detection coil. By adding SRCA array,...

In this paper we present an adaptive program-voltage generator for 3D-integrated solid state drives (SSDs) based on a boost converter. The converter consists of spiral inductor, high-voltage MOS circuit, and adaptive-frequency duty-cycle (AFD) controller. inductor requires area only 5 × mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> in interposer. circuit employs mature NAND flash process. AFD controller, implemented conventional...

In this paper, a printed audio amplifier, which is new application for organic electronics, suggested. The amplifier consists of several fully-printed bendable components including: loudspeaker, field effect transistors (OFETs), capacitors, and resistors. All are fabricated on polyethylene terephthalate (PET) substrate by means high-throughput printing techniques. A complete self-biased circuit reported consisting large multi-finger OFETs with channel length 20 <inline-formula...

In this paper we present User Customizable Logic Paper (UCLP) with a Sea-of Transmission-Gates (SOTG) of 2-V organic CMOS transistors. This can enable users to fabricate custom integrated circuits, by printing 200 wide interconnects at-home ink-jet printers for the prototyping large-area electronics and educational purposes. The SOTG reduces area circuits in UCLP between 11% 85% compared conventional gate array architecture.

In this letter, the AC performance and influence of bending on flexible IGZO thin-film transistors, exhibiting a maximum oscillation frequency (maximum power gain frequency) fmax beyond 300 MHz, are presented. Self-alignment was used to realize TFTs with channel length down 0.5 μm. The layout these optimized for good performance. Besides dimensions, includes ground-signal-ground contact pads. short devices evaluated by measuring their two port scattering parameters. These measurements were...

Wireless power transfer enables the frequent and ubiquitous charging of electronic devices. However, variation efficiency received with transmission distance is an outstanding issue. To solve problem degradation magnetic resonance at short distances, zero-phase-difference capacitance control (ZPDCC), which suitable for integration in large scale integrations (LSIs) proposed this paper. The ZPDCC achieves adaptive by a newly algorithm current-sensing circuit to variable capacitors fixed...

Fully printed organic field effect transistors (OFETs) are fabricated on a flexible, 100-μm-thick, polyethylene terephthalate substrate using high-throughput printing techniques: 1) Cyflex; 2) gravure; 3) screen; and 4) flexographic without cleanroom, below 130°C. The dependence of the transconductance g <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</sub> , transit-frequency f xmlns:xlink="http://www.w3.org/1999/xlink">T,</sub>...

This paper presents a fully integrated operational amplifier (OPAMP) with positive feedback fabricated in flexible amorphous indium gallium zinc oxide (a-IGZO) thin film transistor (TFT) technology. The OPAMP is implemented by using 5 µm nMOS a-IGZO TFT process, and operated from dc supply voltage of 6 V. circuit relies on the input differential pair to improve gain. measured open-loop gain 19 dB over 3 bandwidth 25 kHz 70° PM (phase margin). unity-gain frequency, output swing voltage, power...

A surface electromyogram (EMG), which measures a voltage waveform produced by skeletal muscles on skin, is an important tool for applications detecting the human will of motion, such as prosthetic hands and legs. In application to hand, multipoint EMG measurement required precisely control hand [1, 2]. Conventional measurements with passive electrode array [1-3], however, have two problems: 1) Measurement over long time period annoying, because electrodes placed skin are rigid, 2) signal...

The authors present the implementation of two amplifiers in a commercial flexible amorphous Indium Gallium Zinc Oxide (a‐IGZO) thin‐film transistor (TFT) technology: Cherry Hooper (CH) amplifier and 4‐stage common source amplifier. CH is designed as pre‐amplifier for wireless receivers. It optimised high gain‐bandwidth product (GBW). From supply voltage V it provides 19.4 dB gain has ‐bandwidth 5.3 MHz, while consuming 0.2 mW. GBW 49.35 which more than factor better previously reported...

There is a practical gap between conventional rigid electronics and bendable items from daily life, such as paper, tape, textiles, the human body. This space can be bridged by flexible transistor technologies, which typically offer bendability, light weight, ultrathin dimensions, transparency, some stretchability, suitability for large areas, low cost. Thanks to continuous increase of maximal operation frequency electronics, wireless communication becoming one promising enablers many new...

This paper presents an ultra-wideband transceiver based on a newly proposed double thresholding scheme. The scheme does not require any precise synchronization and thus is practical in ad-hoc networks. architecture has high noise multi-path fading signal immunities. All analog blocks are activated short period called 'flashing' to suppress total average power. A tested chip manufactured using 0.15mum FD-SOI CMOS technology. measured power 299muW at 25kbps data-rate over the distance of 35cm

In order to explore the feasibility of large scale subthreshold logic circuits and clarify lower limit supply voltage (VDD) for circuits, dependence minimum operating (VDDmin) CMOS gates on number stages, gate types width is systematically measured with 90-nm ring oscillators (RO's). The average VDDmin inverter RO's increased from 90 mV 343 when RO stages 11 1Mega, which indicates difficulty VDD scaling in circuits. calculated current model random threshold (VTH) variations compared results,...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> A stretchable <formula formulatype="inline"><tex Notation="TeX">$12\times 12\ {\hbox {cm}}^{2}$</tex></formula> electromagnetic interference (EMI) measurement sheet is developed to enable the of EMI distribution on surface electronic devices by wrapping in sheet. The consists an 8 Notation="TeX">$\times$</tex></formula> coil array, a 2 V organic CMOS row decoder and column selector, 40%...

This paper investigates the effect of TSV resistance (R <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">TSV</sub> ) on performance boost converters for Solid State Drive (SSD) using circuit simulation. When R is 0 Omega, both rising time (t xmlns:xlink="http://www.w3.org/1999/xlink">rise</sub> from V to 15 and energy during boosting (E xmlns:xlink="http://www.w3.org/1999/xlink">loss</sub> output voltage (V...

A 100-V ac energy meter based on the system-on-a-film (SoF) concept, in which various devices are integrated a flexible film, is presented. The system consists of 20-V organic CMOS digital and analog circuits with floating gate (FG) for process variation compensation, pMOS rectifiers generating 50-Hz clock dc power, an LED (OLED) bar indicator. SoF therefore can be installed to monitor each outlet simultaneously. printable, it expected that they formed using low-cost printing future. measure...