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In this paper, the importance of on-chip inductor modeling in radio frequency integrated circuits is discussed. The paper describes the problems arising during inductor modeling in available technologies and presents a solution. In the first part, the paper describes the fundamentals of on-chip inductor modeling. The most important parameters of the inductor, i.e. L, Q, R, SRF, are defined. The inductance...
In this paper the specialized chip for pulse oximetry measurements is presented. It has been developed as a part of the system for human vital signs monitoring. It allows a non-invasive measurement of blood oxygen saturation basing on the difference in light absorption coefficient for oxygenated and deoxygenated blood (oximetry). The chip has been fabricated in UMC 130nm technology. Measurement results...
This paper presents the design and implementation of the integrated circuit aimed at pulse oximetry measurements and intended to be a part of the biomedical SoC. The basics of the noninvasive method for oxygen saturation monitoring are briefly described and then the overview of the designed chip is presented and discussed. Next, several important simulation results are shown, proving proper operation...
This paper deals with the design and implementation of transmitter and receiver modules for pulse oximeter system. First, the fundamentals of noninvasive method for monitoring the oxygen saturation are briefly described. Next, two proposed modules and their monolithic implementations are presented and discussed. These sections describe the integrated transmitter and receiver circuits intended to work...
The BioSoC is a highly integrated SoC that consists of analog front-ends, analog to digital converters and a 32-bit microcontroller — Adelite. The designed IC allows for dynamic acquisition and processing of the most important human physiological parameters. The provided analog interfaces to external electrodes and sensors allow measurement of electrocardiograms (ECG), electromyograms (EMG), skin...
In this paper a comparison of four low noise amplifiers (LNAs), designed in fully depleted SOI 28 nm technology, has been presented. The objective of the presented work was to verify the usability of all kinds of MOSFET transistors that are available in UTBB for RF analog designs. The inductively degenerated cascodes were used in simulations. Such topology achieves high gain and low noise figure (NF)...
A system-on-chip allowing dynamic measurement and processing of the most important human physiological parameters has been presented. The BioChip consists of analog front-ends, analog to digital converters and a two core 32-bit microcontroller Azurite. The two core architecture allows to control the signals' acquisition, data processing and communication with the peripherals simultaneously. The microcontroller...
This paper presents a sixth-order IF polyphase band-pass filter design in 28 nm FD-SOI technology. This filter has been synthesized from a low-pass Butterworth filter prototype. The filter's bandwidth is 1.2 MHz and its center frequency is 2 MHz. A calibration technique using back-gate biasing that is available in fully depleted SOI to minimize the mismatch impact, has been also described. The two...
In this paper a low-voltage LC voltage-controlled oscillator (VCO) design automation tool has been presented. The tool is based on design methodology, which takes under consideration trade-offs between power consumption, phase noise and tuning range. NMOS only architecture is considered because of its capability to work with low supply voltages. One of the goals, while creating the tool, was to make...
In this paper a comparison of two low noise amplifiers (LNAs) designed in two 90 nm CMOS technologies (so called A and B) has been made. For each technology two LNA topologies were simulated: inductively degenerated cascode (LC), which achieves high gain and low noise figure (NF), and folded cascode (FC), which can work with low supply voltage. These amplifiers were designed for a GPS/Galileo receiver...
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