Single-Chip Low-Voltage Analog-to-Digital Interface for Encapsulation with Electret Microphone

AbstractThis paper discusses the design of chip-less RFID tags of a standard pocket size of 69 mm by 156 mm. These tags are based on lumped elements of copper metal traces constructed on a thin polyamide flexible substrate. Moreover, a low-cost single-chip Bluetooth detector circuit system is demonstrated. Two different detection methods: variable coil load coupling and optical light intensity detection were combined to yield 256 unique ID codes. In the first method, by utilizing simple 4 MHz digital drivers and an integrated analog to digital converter (ADC) in the reader controller; various inductively coupled resonant loads corresponding to multiple distinct tags could be differentiated, yielding eight different (3-bit) ID codes. The additional via-based hole pattern reflectometer method creates additional 32 distinct levels (5-bit) utilizing 650 nm visible light-emitting diode and a simple trans-impedance operational along with the same analog ADC pins of a Bluetooth controller. The printed circuit board trace coil on the two-layer low-cost FR-4 waterproof sealed detector unit is simultaneously used as a Qi wireless power receiver to charge the120 mAh 2450 Lithium Polymer (LiR) battery. The device could remain operational for more than a month with a single charge; remaining connected with a mobile device and enabling 10 readouts daily.

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Low-noise CMOS analog-to-digital interface for MEMS resistive microphone

2013 IEEE 20th International Conference on Electronics, Circuits, and Systems (ICECS) ◽

10.1109/icecs.2013.6815450 ◽

2013 ◽

Author(s):

J. Nebhen ◽

E. Savary ◽

W. Rahajandraibe ◽

C. Dufaza ◽

S. Meillere ◽

...

Keyword(s):

Low Noise ◽

Digital Interface ◽

Analog To Digital

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Iterative Signal Processing for Mitigation of Analog-to-Digital Converter Clipping Distortion in Multiband OFDMA Receivers

Journal of Electrical and Computer Engineering ◽

10.1155/2012/532560 ◽

2012 ◽

Vol 2012 ◽

pp. 1-16 ◽

Cited By ~ 5

Author(s):

Markus Allén ◽

Toni Levanen ◽

Jaakko Marttila ◽

Mikko Valkama

Keyword(s):

Fundamental Problem ◽

Turbo Decoding ◽

Laboratory Measurements ◽

Digital Interface ◽

Analog To Digital ◽

Front End ◽

Digital Hardware ◽

Receiver Performance ◽

Almost All ◽

Clipping Distortion

In modern wideband communication receivers, the large input-signal dynamics is a fundamental problem. Unintentional signal clipping occurs, if the receiver front-end with the analog-to-digital interface cannot respond to rapidly varying conditions. This paper discusses digital postprocessing compensation of such unintentional clipping in multiband OFDMA receivers. The proposed method iteratively mitigates the clipping distortion by exploiting the symbol decisions. The performance of the proposed method is illustrated with various computer simulations and also verified by concrete laboratory measurements with commercially available analog-to-digital hardware. It is shown that the clipping compensation algorithm implemented in a turbo decoding OFDM receiver is able to remove almost all the clipping distortion even under significant clipping in fading channel circumstances. That is to say, it is possible to nearly recover the receiver performance to the level, which would be achieved in the equivalent nonclipped situation.

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An analog to digital interface for digital video signal processing

International Conference on Consumer Electronics ◽

10.1109/icce.1989.69136 ◽

1989 ◽

Cited By ~ 1

Author(s):

Walbrou

Keyword(s):

Signal Processing ◽

Digital Video ◽

Video Signal ◽

Digital Interface ◽

Analog To Digital ◽

Video Signal Processing

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Software Design of Pulse Generator Based on Single-Chip Computer and CPLD

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.201-202.218 ◽

2012 ◽

Vol 201-202 ◽

pp. 218-221

Author(s):

Ji Gao ◽

Xiao Fang Ma ◽

Qing Yang Liu

Keyword(s):

Electrical Discharge ◽

Pulse Generator ◽

Low Voltage ◽

Electrical Discharge Machining ◽

Pulse Signal ◽

Pulse Power ◽

Technical Requirement ◽

Signal Source ◽

Single Chip ◽

Single Chip Computer

The purpose of this article is to study and devise pulse signal source of electrical discharge machining(EDM). The technology of EDM is the necessary key technology in various processing methods. Electrical discharge machining pulse power aims to convert the industrial frequency alternating current into certain frequencies pulse current to supply energy for electrode discharging to removal metal. Pulse power generator, controlled by an embedded MCU, can produce high voltage or low voltage discharge pulse waveform. After the research on characteristics and principles of many pulse powers, a novel, intelligent, high frequency pulse power supply with adjustable amplitude, frequency and duty is developed which has a favorable foreground in engineering application and a great theoretical significance. This paper is to realize the design of EDM pulse signal source based on the method of combining single-chip computer and complex programmable logic devices (CPLD), to satisfy the technical requirement of periodic variable and machining efficiency improving.

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