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A 20 μW dual-channel analog front-end in 65nm CMOS for portable ECG monitoring system
2015 Edition, November 1, 2015 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a dual-channel analog front-end (AFE) for portable ECG monitoring system. The AFE consists of an instrumentation amplifier, a DC servo loop (DSL), a fixed gain amplifier (FGA), a programmable gain amplifier (PGA) and an ADC buffer. To...

A 20μW 10MHz relaxation oscillator with adaptive bias and fast self-calibration in 40nm CMOS for micro-aerial robotics application
2013 Edition, November 1, 2013 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Efficient actuation control of flapping-wing microrobots requires a low-power frequency reference with good absolute accuracy. To meet this requirement, we designed a fully-integrated 10MHz relaxation oscillator in a 40nm CMOS...

A 550-μW 20-kHz BW 100.8-dB SNDR Linear-Exponential Multi-Bit Incremental Σ Δ ADC With 256 Clock Cycles in 65-nm CMOS
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents an incremental analog-to-digital converter (IADC) with a two-phase linear-exponential accumulation loop. In the linear phase, the loop works as a first-order structure. The noise-coupling (NC) path is then enabled in the exponential phase thus...

A 0.2V, 7.5 μW, 20 kHz ΣΔ modulator with 69 dB SNR in 90 nm CMOS
2007 Edition, September 1, 2007 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a frequency-to-digital SigmaDelta modulator designed in a digital 90nm CMOS process, operating with a supply voltage of 0.2 V. For a 7.5 muW power consumption, the SNR is 68.9 dB and the SNDR is 60.3 dB over a...

Evolution of Chip-Scale Heterodyne Optical Phase-Locked Loops towards Watt Level Power Consumption
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We design and experimentally demonstrate two chip-scale and agile heterodyne optical phase-locked loops (OPLLs) based on two types of InP-based photonic integrated coherent receiver circuits. The system performance of the first generation OPLL was improved in terms of...

Magnetically driven energy-harvester with monolithically integrated high-energy-density magnets
2017 Edition, June 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents the first piezoelectric MEMS energy-harvester with monolithically integrated fully back-end-of-line compatible high-energy-density micromagnets. At resonance a power output of up to 20 μW is reported which is by orders of magnitude higher than state-of-the-art...

A 0.052 mm², <0.4 % THD, Sinusoidal Current Generator for Bio-Impedance Measurement Using a Recursive Digital Oscillator and Current-Domain FIR Filter
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a low-power, low-area and low THD sinusoidal current stimulator circuit for bio-impedance measurement. Proposed current generator includes recursive digital oscillator for sine wave generation and delta-sigma modulated 1 bit current...

A uW Backscatter-Morse-Leaf Sensor for Low-Power Agricultural Wireless Sensor Networks
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Nowadays, the monitoring of plant water stress is of high importance in smart agriculture. Instead of the traditional ground soil-moisture measurement, leaf sensing is a new technology, which is used for the detection of plants needing water. In this work, a...

A 0.9-V 100-μW Feedforward Adder-Less Inverter-Based MASH Δ Σ Modulator With 91-dB Dynamic Range and 20-kHz Bandwidth
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A 0.9-V Δ Σ modulator integrated into a 0.18-μm CMOS technology for digitizing signals in low-power devices is presented in this paper. To do so, a cascade (multistage noise shaping) architecture based on an adder-less feedforward structure is...

High Power Density Low-Lead-Piezoceramic-Polymer Composite Energy Harvester
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Polymer-piezoceramic composites show mutual properties of piezoceramics and polymers that can be efficiently utilized in energy harvesting applications. Here we fabricated 0-3 composite films using high performance low-lead piezo-ceramic (x)Bi(Ni1/2Zr1/2)O3-(1-x)PbTiO3 (BNZ-PT)...

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