Single-Chip Fully Integrated Direct-Modulation CMOS RF Transmitters for Short-Range Wireless Applications

El‐Desouki, Munir M.; Qasim, Syed Manzoor; BenSaleh, Mohammed S.; Deen, M. Jamal

doi:10.3390/s130809878

Cited by 7 publications

(7 citation statements)

References 26 publications

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“…The demand for high-data-rate and low-power wireless transceivers is increasing significantly for Medical Implantable Communications Service (MICS) transceivers [ 1 , 2 ]. Among MICS, a small and low-power communication front-end is one of the most important parts, which is attracting more and more attention from both the academy and industry [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

A Low Power Low Phase Noise Oscillator for MICS Transceivers

Kang

et al. 2017

Sensors

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A low-power, low-phase-noise quadrature oscillator for Medical Implantable Communications Service (MICS) transceivers is presented. The proposed quadrature oscillator generates 349~689 MHz I/Q (In-phase and Quadrature) signals covering the MICS band. The oscillator is based on a differential pair with positive feedback. Each delay cell consists of a few transistors enabling lower voltage operation. Since the oscillator is very sensitive to disturbances in the supply voltage and ground, a self-bias circuit for isolating the voltage disturbance is proposed to achieve bias voltages which can track the disturbances from the supply and ground. The oscillation frequency, which is controlled by the bias voltages, is less sensitive to the supply and ground noise, and a low phase noise is achieved. The chip is fabricated in the UMC (United Microelectronics Corporation) 0.18 μm CMOS (Complementary Metal Oxide Semiconductor) process; the core just occupies a 28.5 × 22 μm2 area. The measured phase noise is −108.45 dBc/Hz at a 1 MHz offset with a center frequency of 540 MHz. The gain of the oscillator is 0.309 MHz/mV with a control voltage from 0 V to 1.1 V. The circuit can work with a supply voltage as low as 1.2 V and the power consumption is only 0.46 mW at a 1.8 V supply voltage.

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Section: Introductionmentioning

confidence: 99%

A Low Power Low Phase Noise Oscillator for MICS Transceivers

Kang

et al. 2017

Sensors

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“…Ocular drug delivery is a new concept introduced in this work and utilizes voltage-controlled dissolution of a Au membrane for controlled release of pharmaceuticals. Communication is carried out using RF ASK modulation at 433 MHz (see Section “Wireless Communication”), which is in line with recent trends of similar devices using RF communication …”

Section: Organ Interfacesmentioning

confidence: 83%

“…Communication is carried out using RF ASK modulation at 433 MHz (see Section 7 "Wireless Communication"), which is in line with recent trends of similar devices using RF communication. 586 The resulting system is capable of wireless and battery-free detection of tear-based glucose concentrations and on-demand drug delivery. The capability demonstrates that, during an in vivo experiment, diabetic rabbit models are treated with insulin.…”

Section: Visual System Recording and Stimulation Devicesmentioning

confidence: 99%

Wireless Battery-free and Fully Implantable Organ Interfaces

Bhatia,

Hanna,

Stuart

et al. 2024

Chem. Rev.

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Advances in soft materials, miniaturized electronics, sensors, stimulators, radios, and battery-free power supplies are resulting in a new generation of fully implantable organ interfaces that leverage volumetric reduction and soft mechanics by eliminating electrochemical power storage. This device class offers the ability to provide high-fidelity readouts of physiological processes, enables stimulation, and allows control over organs to realize new therapeutic and diagnostic paradigms. Driven by seamless integration with connected infrastructure, these devices enable personalized digital medicine. Key to advances are carefully designed material, electrophysical, electrochemical, and electromagnetic systems that form implantables with mechanical properties closely matched to the target organ to deliver functionality that supports high-fidelity sensors and stimulators. The elimination of electrochemical power supplies enables control over device operation, anywhere from acute, to lifetimes matching the target subject with physical dimensions that supports imperceptible operation. This review provides a comprehensive overview of the basic building blocks of battery-free organ interfaces and related topics such as implantation, delivery, sterilization, and user acceptance. State of the art examples categorized by organ system and an outlook of interconnection and advanced strategies for computation leveraging the consistent power influx to elevate functionality of this device class over current battery-powered strategies is highlighted.

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“…This sort of oscillator is called a voltage controlled oscillator (VCO) or current controlled oscillator (CCO). Many voltage controlled oscillators are found in sensor applications, for example, in impedance spectroscopy [1], microelectromechanical systems (MEMS) sensor [4], IoT sensors [5,6], motion detection sensors [7], sensor readout circuit [8], wireless sensor network [9][10][11], basal-body-temperature detection sensor [12], image sensor [13], intelligent human sensing system [14], etc. These voltage controlled oscillators are designed and implemented in CMOS chips, which provides many advantages, for example, low power consumption, compact size, low voltage operation, high speed, etc.…”

Section: Introductionmentioning

confidence: 99%

Current/Voltage Controlled Quadrature Sinusoidal Oscillators for Phase Sensitive Detection Using Commercially Available IC

Jaikla

Adhan

Suwanjan

et al. 2020

Sensors

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This paper presents the quadrature sinusoidal oscillators for a phase sensitive detection (PSD) system. The proposed oscillators are design by using the commercially available ICs (LT1228). The core oscillator consists of three LT1228s: two grounded capacitors and one resistor. By adding four resistors without the requirement of additional active devices, the amplitudes of two quadrature waveforms become adjustable. The quadrature output nodes are of low impedance, which can be connected to the impedance sensor or other circuits in a phase sensitive detection system without the need of buffer devices. The amplitudes of the quadrature waveform are equal during the frequency of oscillation (FO) tuning. The frequency of oscillation is electronically and linearly controlled by bias current or voltage without affecting the condition of oscillation (CO). Furthermore, the condition of oscillation is electronically controlled without affecting the frequency of oscillation. The performances of the proposed oscillators are experimentally tested with ±5 voltage power supplies. The frequency of the proposed sinusoidal oscillator can be tuned from 8.21 kHz to 1117.51 kHz. The relative frequency error is lower than 3.12% and the relative phase error is lower than 2.96%. The total harmonic distortion is lower than −38 dB (1.259%). The voltage gain of the quadrature waveforms can be tuned from 1.97 to 15.92. The measurement results demonstrate that the proposed oscillators work in a wide frequency range and it is a suitable choice for an instrument-off-the-shelf device

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Single-Chip Fully Integrated Direct-Modulation CMOS RF Transmitters for Short-Range Wireless Applications

Cited by 7 publications

References 26 publications

A Low Power Low Phase Noise Oscillator for MICS Transceivers

A Low Power Low Phase Noise Oscillator for MICS Transceivers

Wireless Battery-free and Fully Implantable Organ Interfaces

Current/Voltage Controlled Quadrature Sinusoidal Oscillators for Phase Sensitive Detection Using Commercially Available IC

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