A 350&amp;#x03BC;W CMOS MSK transmitter and 400&amp;#x03BC;W OOK super-regenerative receiver for Medical Implant Communications

Bohorquez, J.; Dawson, Joel L.; Chandrakasan, Anantha P.

doi:10.1109/vlsic.2008.4585940

Cited by 85 publications

(77 citation statements)

References 5 publications

(7 reference statements)

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“…Integration of BAN with the existing information infrastructure will create a truly pervasive environment for many of these critical applications with great impact on improving the quality of life. Some recent advances in microelectronics indicate that the technology to achieve ultra-small and ultra-low power devices for these applications is within reach [5,6]. However, numerous regulatory and technical challenges including efficient transceiver design, reliability, biocompatibility, size, cost, energy source, sensing/actuator technology, privacy and security issues still need to be resolved [7,8].…”

Section: Introductionmentioning

confidence: 99%

Channel Models for Medical Implant Communication

Sayrafian-Pour

Yang

Hagedorn

et al. 2010

Int J Wireless Inf Networks

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Information regarding the propagation media is typically gathered by conducting physical experiments, measuring and processing the corresponding data to obtain channel characteristics. When this propagation media is human body, for example in case of medical implants, then this approach might not be practical. In this paper, an immersive visualization environment is presented, which is used as a scientific instrument that gives us the ability to observe RF propagation from medical implants inside a human body. This virtual environment allows for more natural interaction between experts with different backgrounds, such as engineering and medical sciences. Here, we show how this platform has been used to determine channel models for medical implant communication systems.

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Section: Introductionmentioning

confidence: 99%

Channel Models for Medical Implant Communication

Sayrafian-Pour

Yang

Hagedorn

et al. 2010

Int J Wireless Inf Networks

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“…Therefore, rather than using a complete phase-locked loop (PLL) structure, many FSK modulators are implemented using VCOs only [2,3,5,[9][10][11]. In [2], a divider is used to obtain the second carrier frequency from the VCO, while another multiplexer (MUX) selects the FSK output from the two carrier frequencies via the message signal.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore there is no need for additional circuits such as MUX or dividers. So is the FSK transmitter designed in [10], which uses small loop antenna at the transmitter terminal as its inductive element in the VCO, and is modulated directly with digital data, even without a power amplifier.…”

Section: Introductionmentioning

confidence: 99%

Simple oscillators-based readout circuit for low-power biomedical implant system

Zhu

Islam

Haider

et al. 2012

Analog Integr Circ Sig Process

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This paper reports a wireless sensor readout circuit for continuous physiological parameters monitoring including a potentiostat, a data generation unit and a frequency-shift-keying (FSK) modulator unit with the low drop-out (LDO) regulator for biomedical implant system. The potentiostat can generate an output potential of 0.7 V for the data generation unit. The data generation unit is designed based on a relaxation oscillator scheme and can be used to sense a current signal from any amperometric biomedical sensor and convert the signal to a square waveform in which the frequency of the square wave signal is proportional to the sensor current. FSK modulation scheme has been selected for wireless transmission. Designed with a very simple ring oscillator, this modulator integrates the modulation functionality into the oscillator itself by using the data signal to control the oscillation frequency. The prototype circuits have been fabricated in a 0.35 lm bulk complementary metal-oxide semiconductor (CMOS) process. Working with a regulated 1.8 V supply, the potentiostat consumes only 2 lA of current while the data generation unit can generate around 15.7 kHz output frequency with an input current of 1 lA. The FSK modulator consumes a total current of around 19 lA for a carrier frequency around 1 MHz. An off-chip demodulator is constructed to demodulate the data signal from the FSK modulator and the demodulated signal has less than 1.6 % variation of frequency.

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“…The collected pressure data are transmitted to the receiver for further processing or storage. Wireless technologies which communicate by signaling on or even through the human body have recently been reported [11][12][13][14][15][16][17][18][19]. Conventional transmitters employ radio-transmission through the air and are based on standards such as Wi-Max or ZigBee.…”

Section: Introductionmentioning

confidence: 99%

An OOK Body-Channel Transceiver Front-End ASIC for Distributed Force Measurement

Huang

Rieger

2009

J Sign Process Syst

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The design and implementation of a fully integrated transceiver front-end for biomedical data is reported. The system targets the transmission of force data from a distributed sensor system for on-body application. A prototype force transducer patch is presented whose parasitic capacitance is exploited as coupling capacitance for body-channel transmission. The transceiver is implemented in 0.35 μm CMOS technology and occupies an area of 0.0178 mm 2 . It consumes 360 μA of current at a supply voltage of 3 V. Measured results further confirm a transmission rate of 54 kb/s making the design suitable for use in a distributed pressure sensing network.

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A 350μW CMOS MSK transmitter and 400μW OOK super-regenerative receiver for Medical Implant Communications

Cited by 85 publications

References 5 publications

Channel Models for Medical Implant Communication

Channel Models for Medical Implant Communication

Simple oscillators-based readout circuit for low-power biomedical implant system

An OOK Body-Channel Transceiver Front-End ASIC for Distributed Force Measurement

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