| 1. |
- Isfahani, S. M. M., et al.
(författare)
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An ultra-low power multi-tunable triangle wave generator with frequency and amplitude control
- 2010
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Ingår i: ; , s. 236-239
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Konferensbidrag (refereegranskat)abstract
- ultra-low power adjustable triangle wave generator with a multi tunable amplitude and frequency is introduced in this paper. The proposed circuit consists of a Schmitt trigger and a current source. The overall nonlinearity of the TWG circuit is less than 2% in its current-to-frequency transfer characteristic. The tunable frequency and amplitude range are 10KHz to 40KHz and 0.1V-1.7V respectively. The topology is suitable for VLSI realization and can be used in the WINeR system.
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| 2. |
- Kazerouni, I. A., et al.
(författare)
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A 77 nW bioamplifier with a tunable bandwidth for neural recording systems
- 2010
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Ingår i: IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS. - 9781424474561 ; , s. 36-39
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Konferensbidrag (refereegranskat)abstract
- In this paper a low-power low-noise amplifier for neural recording and biomedical applications is presented. The frequency band of the amplifier is tunable. It has a gain of 28.3 dB. The low and the high cut-off frequency can be adjusted from 24 mHz to 30.6 Hz and 4.5 kHz to 7.47 kHz, respectively. The circuit is designed in 0.18μm CMOS process, and it consumes only 77.8 nW at 1.8V supply voltage. The simulation results show a 14.3μV input-referred noise corresponding to 1.32 efficiency factor (NEF). It is a great improvement compared with recent presented works in terms on power consumption and NEF which is vital in neural recording applications.
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| 3. |
- Matindoust, S., et al.
(författare)
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Food quality and safety monitoring using gas sensor array in intelligent packaging
- 2016
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Ingår i: Sensor Review. - : Emerald Group Publishing Limited. - 0260-2288 .- 1758-6828. ; 36:2, s. 169-183
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Tidskriftsartikel (refereegranskat)abstract
- Purpose - This paper aims to study different possibilities for implementing easy-to-use and cost-effective micro-systems to detect and trace expelled gases from rotten food. The paper covers various radio-frequency identification (RFID) technologies and gas sensors as the two promoting feasibilities for the tracing of packaged food. Monitoring and maintaining quality and safety of food in transport and storage from producer to consumer are the most important concerns in food industry. Many toxin gases, even in parts per billion ranges, are produced from corrupted and rotten food and can endanger the consumers' health. To overcome the issues, intelligent traceability of food products, specifically the packaged ones, in terms of temperature, humidity, atmospheric conditions, etc., has been paid attention to by many researchers. Design/methodology/approach - Food poisoning is a serious problem that affects thousands of people every year. Poisoning food must be recognized early to prevent a serious health problem. Contaminated food is usually detectable by odor. A small gas sensors and low-cost tailored to the type of food packaging and a communication device for transmitting alarm output to the consumer are key factors in achieving intelligent packaging. Findings - Conducting polymer composite, intrinsically conducting polymer and metal oxide conductivity gas sensors, metal- oxide-semiconductor field-effect transistor (MOSFET) gas sensors offer excellent discrimination and lead the way for a new generation of "smart sensors" which will mould the future commercial markets for gas sensors. Originality/value - Small size, low power consumption, short response time, wide operating temperature, high efficiency and small area are most important features of introduced system for using in package food.
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| 4. |
- Kianpour, I., et al.
(författare)
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A subthreshold ultra low power 22fJ/conversion flash ADC for RFID sensing applications
- 2011
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Ingår i: 2011 19th Iranian Conference on Electrical Engineering (ICEE). - 9781457707308 - 9789644634284 ; , s. 1-4
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In this paper an ultra low power Flash ADC for RFID application is presented. Several techniques are used to further reduce the power consumption and relatively elevate the speed of the ADC. These techniques include a low power Track-and-Latch comparator with no static current, large resisters in the resister string, an optimum encoder with only 2 stages using subthreshold design with the aid of low supply voltage of 0.7v for resister string and 0.5v for all logic blocks. In this ADC by absolute approximation the occupied area is equal with area of 16 resisters in the string. The circuit designed in 0.18μm CMOS technology and simulations show that the 4-bit ADC consumes almost 14.5μW at 40MS/s and 93.8nW at 0.1MS/s; however, it minimally dissipates only 22fJ per each conversion step. The results show that the proposed ADC could seriously compete with other low power ADCs in RFID sensing applications such as SAR ADCs.
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| 5. |
- Nilsaz, A. S., et al.
(författare)
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Low power 0.18 um CMOS ultra wideband inductor-less LNA design for UWB receiver
- 2010
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Ingår i: IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS. - 9781424474561 ; , s. 855-858
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Konferensbidrag (refereegranskat)abstract
- This paper presents an inductor-less low-noise amplifier (LNA) design for ultra-wideband (UWB) receivers and microwave access covering the frequency range from 0.4 to 5.7 GHz using 0.18-μm CMOS. Simulation results show that the voltage gain reaches a peak of 18.94 dB in-band with an upper 3-dB frequency of 5.7 GHz. The IIP3 is about 3 dBm and the noise figure (NF) ranges from 3.15-3.86 dB over the band of interest. Input matching is better than -8.79dB and the LNA consumes 5.77mW at 1.8V supply voltage. A figure of merit is used to compare the proposed design with recently published wideband CMOS LNAs. The proposed design achieves a superior voltage gain and tolerable NF, with the additional advantage of removing the bulky inductors. It is shown that the designed LNA without on-chip inductors achieves comparable performances with inductor-based designs.
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| 6. |
- Sarmiento, David M., et al.
(författare)
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Low power tunable CMOS I-UWB transmitter design
- 2007
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Ingår i: 2007 Norchip. - 9781424415168 ; , s. 116-119
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Konferensbidrag (refereegranskat)abstract
- In this paper an on-chip tunable Impulse-Ultra Wide Band Transmitter is presented. It is capable of modifjing the power emission to comply with the FCC regulations at different pulse rates up to 300 NMz using two external controls. The maximum power consumption is 1.2 mW and 142 mu W at 300 NMz and 10 AM PRF respectively with a leakage current of 100 nA. The prototype has been designed in 0.18 UMC technology and placed in a QFN lead-less package.
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| 7. |
- Sarmiento M., David, et al.
(författare)
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A 9.2pJ/pulse UWB-IR transmitter with tunable amplitude for wireless sensor tags in 0.18um CMOS
- 2010
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Konferensbidrag (refereegranskat)abstract
- This paper presents a transmitter design for Ultra Wideband Impulse Radio (UWB-IR) communications. The design is targeted towards the implementation of passive Wireless Sensor Tags (WST) where micro-power consumption is required. The transmitter has been implemented in UMC 0.18μm CMOS and placed inside a QFN lead-less package. It complies with the FCC regulations for Pulse Rate Frequencies (PRF) up to 10MHz using OOK modulation. It is capable of adjusting the Power Spectral Emissions (PSE) modifying the transmitted pulse amplitude to always achieve the best BER/Power performance depending on the application demands. The power emission tunability has been validated implementing a complete communication link using a low sensitivity non-coherent energy receiver. Measurements show a maximum power consumption of 92uW@10MHz PRF having a maximum energy/pulse of 9.2 pJ.
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