Intracortical wireless microsystems for biosensing and neurostimulation

2009 ◽  
Author(s):  
Mohamad Sawan
Keyword(s):  
Wireless Microsystems

Microsystems for Wireless Sensor Networks with Biomedical Applications

2012 ◽  
pp. 1255-1292
Author(s):  
J. P. Carmo ◽  
N. S. Dias ◽  
J. H. Correia
Keyword(s):  
Respiratory Function ◽  
Biomedical Applications ◽  
Medical Diagnostics ◽  
Rf Transceiver ◽  
Rf Transceivers ◽  
Oxide Electrodes ◽  
Wireless Interface ◽  
Wireless Microsystems ◽  
Wireless Eeg ◽  
Diagnostics And Therapy

This chapter introduces the concept of wireless interface, followed by the discussion of the fundamental items, concerning the fabrication of microsystems comprising low-power devices. Using as example, a design of a RF transceiver the frequency of 2.4 GHz and fabricated using a UMC RF CMOS 0.18 µm process, it will be discussed the main issues in the design of RF transceivers for integration in wireless microsystems. Then, it will be presented two biomedical applications for wireless microsystems: the first is a wireless EEG acquisition system, where it is presented the concept of EEG electrode and the characterisation of iridium oxide electrodes. The other application, is a wireless electronic shirt to monitoring the cardio-respiratory function. The main goal of these applications, is to improve the medical diagnostics and therapy by using devices which reduces healthcare costs and facilitates the diagnostic while at the same time preserving the mobility and lifestyle of patients.

Microsystems for Wireless Sensor Networks with Biomedical Applications

2010 ◽  
pp. 27-64
Author(s):  
J. P. Carmo ◽  
N. S. Dias ◽  
J. H. Correia
Keyword(s):  
Respiratory Function ◽  
Biomedical Applications ◽  
Medical Diagnostics ◽  
Rf Transceiver ◽  
Rf Transceivers ◽  
Oxide Electrodes ◽  
Wireless Interface ◽  
Wireless Microsystems ◽  
Wireless Eeg ◽  
Diagnostics And Therapy

This chapter introduces the concept of wireless interface, followed by the discussion of the fundamental items, concerning the fabrication of microsystems comprising low-power devices. Using as example, a design of a RF transceiver the frequency of 2.4 GHz and fabricated using a UMC RF CMOS 0.18 µm process, it will be discussed the main issues in the design of RF transceivers for integration in wireless microsystems. Then, it will be presented two biomedical applications for wireless microsystems: the first is a wireless EEG acquisition system, where it is presented the concept of EEG electrode and the characterisation of iridium oxide electrodes. The other application, is a wireless electronic shirt to monitoring the cardio-respiratory function. The main goal of these applications, is to improve the medical diagnostics and therapy by using devices which reduces healthcare costs and facilitates the diagnostic while at the same time preserving the mobility and lifestyle of patients.

Multisensor Fusion for Low-Power Wireless Microsystems

2010 ◽  
pp. 711-748
Author(s):  
Tong Boon Tang ◽  
Alan F. Murray
Keyword(s):  
Low Power ◽  
Multisensor Fusion ◽  
Wireless Microsystems

scholarly journals Wireless microsystems for biomedical applications

2013 ◽  
Vol 12 (2) ◽  
pp. 492-505 ◽  
Author(s):  
João Paulo Carmo ◽  
José Higino Correia
Keyword(s):  
Biomedical Applications ◽  
Wireless Microsystems

scholarly journals An integrated folded-patch antenna for wireless microsystems

2006 ◽  
Author(s):  
P.M. Mendes ◽  
A. Polyakov ◽  
M. Bartek ◽  
J.N. Burghartz ◽  
J.H. Correia
Keyword(s):  
Patch Antenna ◽  
Wireless Microsystems

scholarly journals Design techniques for passive wireless microsystems

2021 ◽  
Author(s):  
Xiongliang Lai
Keyword(s):  
Power Consumption ◽  
Transmission Rate ◽  
Data Communication ◽  
Modulation Scheme ◽  
Voltage Level ◽  
Passive Wireless Microsystems ◽  
Level Shifters ◽  
Wireless Microsystems ◽  
On Chip ◽  
Design Techniques

The unique advantage of harvesting power wirelessly has evolved passive wireless microsystems to a fast-growing high-impact technology. In this dissertation, several new design techniques are proposed for the increasingly stringent requirements of passive wireless microsystems. The absence of on-board batteries imposes ultralow power consumption of passive wireless microsystems. Recent research reveals that multi-voltage systems-on-a-chip dramatically reduce power consumption such that power-efficient on-chip voltage level shifters are critically needed. This dissertation proposes a novel set of voltage level shifters built upon diode-based clamper-rectifier configurations. The voltage level shifters are passively powered by incoming signals with no static current consumption and are able to shift the incoming signals bidirectionally to suit the different voltage domains. The shifting steps could be continuous and are not bounded by the discrete transistor thresholds and power rails. A second bottleneck of passive wireless microsystems is the wireless power-harvesting efficiency that limits the wireless communication distance and the on-chip circuitry complexity and functionality. This dissertation proposes a transformer-based impedance matching network that greatly improves the power transfer efficiency from the receiving antenna to the on-chip circuit loads. The transformer is also capable of automatically calibrating its input impedance to match to the antenna impedance by a novel low-power varactor current tuning technique. In passive wireless microsystems, data modulation scheme largely determines the power transmission efficiency and data communication speed. Exploiting the constant carrier envelop of FSK modulation, this dissertation proposes a dual-tank architecture for FSK receivers in passive wireless microsystems. The dual receiving tanks significantly improves the power conversion efficiency of on-chip AC-to-DC voltage multipliers by providing high-quality-factor resonating tank voltages at each of the alternating FSK carriers. High data transmission rate is also achieved by exploring the dual tanks in an all-digital and a voltage-level shifting FSK demodulators.

Calibration Technique for Maximum Power Harvest of Passive Wireless Microsystems

2015 ◽  
Vol 35 (7) ◽  
pp. 2283-2297
Author(s):  
Xiongliang Lai ◽  
Fei Yuan
Keyword(s):  
Maximum Power ◽  
Calibration Technique ◽  
Passive Wireless Microsystems ◽  
Wireless Microsystems
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