The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Integration of analog and digital circuits is a vital design issue in mixed signal circuits. Switching activity at the digital end widely affects the analog circuitry. This paper presents the generation and variation of substrate current due to the switching activity in a digital circuit and also how the substrate current varies with the switching frequency. The circuit under test is a CMOS inverter...
The Usage of Field Programmable Gate Arrays (FPGA) and Application Specific Integrated Circuits (ASICs) with complex functionalities such as Digital Signal Processing (DSP) is increasing in onboard space applications. Verification of these complex designs within limited schedule and resources is challenging. In order to ensure reliable functioning of these designs in all possible run time conditions,...
This paper presents a 12-bit SA-ADC for portable low power wireless sensor systems. The proposed SA-ADC operates for rail-to-rail input range and achieves low power consumption. Split capacitor array based DAC and a novel charge-integration based dynamic comparator are used for low power consumption of the ADC. Measured DNL and INL are −0.59/0.67 LSB and −1.2/1.33 LSB respectively. At sampling rate...
Ku band antennae are one of the unique features of GSAT11 spacecraft. As the pointing accuracy of the satellite platform is around 0.1°, improved antenna pointing is achieved using the steerable Deployment Pointing Mechanism (DPM), Radio Frequency (RF) Tracking based measurement system and Attitude and Orbit Control Electronics (AOCE) resident controller. Testing of these subsystems in open and closed...
This paper presents an auto navigation platform in Arduino which uses the i2c protocol to interface a digital compass and a rotation encoder to calculate distance travelled and direction with respect to the Earth's magnetic field. The digital compass IC used here is the HMC6352, while the rotation encoder is designed with the help of a MOC7811 coupler IC. The compass contains complete 2-axis sensors,...
Novel tunable distributed harmonic Voltage Controlled Oscillators (VCOs) are reported here for generation of 2nd or 3rd or both 2nd and 3rd harmonic frequency microwave/millimeter-wave signals, designed using Distributed Oscillator (DO) and achieved frequency tuning by body bias. The above generation of signals is become possible by the use of combination of innovative gain cell (i.e. amplifier),...
This paper studies the performance of asymmetric gate oxide on gate-drain overlap for Si and Si1−xGex based double gate (DG) Tunnel FETs (TFETs). For the first time, asymmetric gate oxide is introduced in the gate-drain overlap and compared with that of DG TFETs. For the different values of the mole fraction (x), Si1−xGex is optimized to get ON current (ION) enhancement. Si1−xGex based DG TFETs with...
The need for fast data processing and reducing the power dissipation of digital signal processing(DSP) algorithms and Cryptographic algorithms have provoked the development of efficient hardware implementations of residue number system (RNS) and logarithmic number system(LNS) arithmetic. This paper describes the implementation of adder and subtractor units by using RNS and LNS arithmetic. Addition...
A 0.5V low voltage bulk driven pseudodifferential OTA is presented here. Cross coupling technique both at the gate and bulk level is used to increase the effective output resistance of the OTA core. The effective input transconductance is also improved to achieve the high gain. Theoretical analysis for the operation of the OTA is described and simulation is performed to confirm the operation. The...
Scaling of CMOS technology improved the speed nevertheless the leakage currents are leftover as an adverse effect. The problem has taken a serious turn as the scaling extends into ultra-deep-submicron (UDSM) region. These unsolicited leakage currents should be minimized for the smooth functioning of the circuit. Designing of such leakage free nanoscale CMOS circuits turns to be a challenging task...
In this paper, a novel attempt is made to design a reconfigurable coder system which can be reconfigured on-the-fly to work either as an encoder, or decoder, or both encoder and decoder depending on the user requirements. In order to build the proposed reconfigurable system, Convolutional encoder, Viterbi decoder, Golay encoder and Golay decoder are employed in different combinations for the proposed...
Face recognition is gaining more importance in today's real world for automated transactions. In this paper, we propose FPGA Implementation of Face Recognition System using Efficient 5/3 2D-Lifting scheme. The database image of FVC-2004 DB3_A is resized to 256×256 pixels. The resized image is convolved with 3×3 Gaussian mask kernelsto remove high frequency edges, which improves matching accuracy....
The growing demand of low power electronics equipments has forced the research community to think of some methods by which energy of a circuit can be recycled and then adiabatic logic was born. The literature has experienced a numerous number of adiabatic circuits which faces a lot of complication in terms of glitch, noise and huge no. of transistors employed leading to the increase in device area...
The superior material properties such as higher breakdown field, thermal conductivity and wider bandgap make Silicon Carbide (SiC) appropriate for transistor applications. However, there are certain parameters where SiC have yet to achieve required performance levels. SiC have number of polytypes having mature technology. Being one of the SiC polytypes, 3C-SiC has higher mobility and saturation velocity...
The W-CDMA system plays an important role in the 3G cellular systems because of its compatible networking architecture to the present popular Global System for Mobile Communications (GSM) systems as well as the salient features of a Code Division Multiple Access (CDMA) system, including multi-path fading tolerance, high system capacity, low power consumption, good performance and coverage. In CDMA...
Programmability, flexibility and parallel computational capabilities are some of the features making field-programmable-gate-arrays (FPGAs) advantageous over application-specific-integrated-circuits (ASICs). Thanks to the dynamic partial reconfiguration, FPGA provides a virtual hardware resource wherein hardware tasks can swap in and out of the hardware dynamically at runtime. In this paper, we extend...
Since decades, orthogonal frequency division multiplexing (OFDM) has been drawing its attention in the area of wireless and satellite communication systems such as IEEE 802.11 a/g/n, ADSL, WiMAX and DVB-T/SH. In these applications, OFDM has drawbacks of high Peak-to-Average Power Ratio (PAPR) and Inter carrier symbol interference (ISI). Recently, Carrier Interferometry OFDM (CI-OFDM) as an alternative...
In this article, we present a convex optimization model to design a three dimension (3D)stacked hybrid memory system to improve performance in the dark silicon era. Our convex model optimizes numbers and placement of static random access memory (SRAM) and spin-transfer torque magnetic random-access memory(STT-RAM) memories on the memory layer to exploit advantages of both technologies. Power consumption...
This paper presents the design and simulation of a two stage power management circuit implemented in 0:18μm CMOS that operates from very low voltages starting from 460mV and higher up to a maximum of 800mV. The proposed capacitive power management unit consumes very low power of 11μW @ 500mV sufficient to be operated from tiny photovoltaic cells, dimensions of few mm2. In addition to the lower power...
To achieve the goal of secure communication, cryptography is an essential operation. Many applications, including health-monitoring and biometric data based recognition system, need short-term data security. To design short-term security based applications, there is an essential need of high-performance, low cost and area-efficient VLSI implementation of lightweight ciphers. Data encryption standard...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.