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In this paper a novel current mode charge pump architecture is shown and discussed. The presented DC-DC voltage converter uses extremely low filtering capacitance while still maintaining a low ripple amplitude of the output voltage. The proposed architecture is silicon proven in CMOS 130 nm technology. The power efficiency and layout area trade-offs of the proposed architecture are considered also.
In this paper a new Delta Sigma Fractional N synthesizer architecture is presented. The synthesizer achieves low fractional spurs and quantization noise, which relaxes the trade-off between PLL bandwidth and phase noise. The proposed architecture is based on two delay lines, which are used to compensate the phase error resulting from fractional synthesis. Additionally, dedicated control and calibration...
This paper describes the design of the transceiver, which is the implementation of the physical layer of EIA/TIA-485 standard. This circuit is a part of a more complex System on Chip designed in 130 nm CMOS technology. The problems encountered during the design process was described. The crucial issue was the relatively high voltage range, from −7 V to 12 V, that may appear on the pins of the SoC...
Measuring, monitoring and analysis of dynamic movements in sports during a real-time competition is becoming more important than ever. Many methods used currently may only be applied in the artificial environment of a laboratory. Other methods require too much processing to be used efficiently in real-time. Interesting opportunity for these problems gives acceleration measurements and their usage...
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...
A new temperature calibration technique based on on-chip resistor has been presented. Proposed method can be used in very wide temperature range. Temperature calibration technique was implemented in Python programing language in order to assess the suitability for practice use. The data for this model was obtained from process comers and Monte Carlo simulations. All analog blocks were designed in...
Analog front-end for precise temperature measurement of a human body has been presented. The discussed analog front-end (AFE) contains a new temperature calibration technique based on on-chip resistor. The described calibration method allows to obtain very high accuracy, even 0.1 °C, in very wide range of an operating temperature of an integrated circuit. The AFE consists of a bandgap current reference,...
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 presents a low-pass filter with variable gain for use in direct conversion wireless receivers. The filter is implemented using the switched-capacitor technique. Its sampling clock frequency is, however, only moderately higher than signal frequencies of interest. To cope with the problems that this creates, a new set of design equations are derived, from analytically calculated filter transfer...
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...
This paper describes the architecture and design of a Bluetooth Low Energy Controller. The designed controller consists of a hardware and software part.
Measuring and monitoring of dynamic movements in sport is important. Many of used methods are biased or invasive. In this paper acceleration measurements has been proposed to solve this problem. Three different dynamic movements has been measured: run, jump and punch. Presented results shows that measurements of acceleration may be used for movement parameters extraction and tiredness monitoring of...
The paper presents an Integer-N phase locked loop (PLL) for Bluetooth receiver implemented in CMOS 130 nm technology. The presented phase locked loop consists of an LC quadrature voltage controlled oscillator with capacitor bank, a tri-state phase-frequency detector with charge pump, a third order passive filter and a programmable divider. The PLL has a supply voltage of 1.2 V and dissipates 2.4 mW...
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...
An analog front-end, with a new temperature calibration method, for an accurate temperature measurement of a human body has been presented. The discussed AFE consists of a current reference, a precision current source, a programmable gain amplifier, a voltage source proportional to absolute temperature and on-chip temperature calibration resistor. Human body temperature can be measured in the range...
Measuring, monitoring and analysis of dynamic movements in sports is becoming more important than ever. Many methods used currently may only be applied in the artificial environment of a laboratory. Other methods require too much processing to be used during a real-time competition. To overcome these difficulties acceleration measurements and a simple method to process them have been proposed. Data...
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...
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