Low-cost and efficient digital-compatible BIST for analog circuits using pulse response sampling

2002 ◽  
Author(s):  
P.N. Variyam ◽  
A. Chatterjeee ◽  
N. Nagi
Keyword(s):  
Analog Circuits ◽  
Low Cost ◽  
Pulse Response

scholarly journals On the node ordering of progressive polynomial approximation for the sensor linearization

2019 ◽  
Vol 32 (4) ◽  
pp. 539-554
Author(s):  
Aneta Prijic ◽  
Aleksandar Ilic ◽  
Zoran Prijic ◽  
Emilija Zivanovic ◽  
Branislav Randjelovic
Keyword(s):  
Transfer Function ◽  
Polynomial Approximation ◽  
Analog Circuits ◽  
Low Cost ◽  
Strong Dependence ◽  
Negative Temperature ◽  
Nonlinear Dependence ◽  
Computational Time ◽  
Optimal Order ◽  
Additional Increase

Many sensors exhibit nonlinear dependence between their input and output variables and specific techniques are often applied for the linearization of their transfer characteristics. Some of them include additional analog circuits, while the others are based on different numerical procedures. One commonly used software solution is Progressive Polynomial Approximation. This method for sensor transfer function linearization shows strong dependence on the order of selected nodes in the linearization vector. There are several modifications of this method which enhance its effectiveness but require extensive computational time. This paper proposes the methodology that shows improvement over Progressive Polynomial Approximation without additional increase of complexity. It concerns the order of linearization nodes in linearization vector. The optimal order of nodes is determined on the basis of sensor transfer function concavity. The proposed methodology is compared to the previously reported methods on a set of analytical functions. It is then implemented in the temperature measurement system using a set of thermistors with negative temperature coefficients. It is shown that its implementation in the low-cost microcontrollers integrated into the nodes of reconfigurable sensor networks is justified.

scholarly journals Low-cost DC BIST for analog circuits: A case study

2013 ◽  
Author(s):  
Pablo Petrashin ◽  
Carlos Dualibe ◽  
Walter Lancioni ◽  
Luis Toledo
Keyword(s):  
Analog Circuits ◽  
Low Cost

scholarly journals A First Approach to Design Mobility Function and Noise Filter in VLC System Utilizing Low-cost Analog Circuits

2017 ◽  
Vol 5 (2) ◽  
pp. 14 ◽  
Author(s):  
Syifaul Fuada ◽  
Angga Pratama Putra ◽  
Yulian Aska ◽  
Trio Adiono
Keyword(s):  
Analog Circuits ◽  
Low Cost ◽  
Signal Amplitude ◽  
Visible Light Communication ◽  
Noise Spectrum ◽  
Ideal Condition ◽  
Light Sources ◽  
Analog Filter ◽  
Light Interference ◽  
Receiver System

<p class="0abstract">Visible Light Communication (VLC) as one of wireless technology must be able to offer a good capability as mobile communication system. The signal will be faded when the distance and angle of LED to photo-detector become higher at a certain distance. Other problem at VLC system is light interference noise which is caused by flicker effect from other light sources such as incandescent, fluorescent, DC-lamp (i.e. flashlight) and the sunlight. Each of lights have specific carried signal characteristics and it can influences the VLC system. In this paper we offer design of mobile VLC system based on analog domain. We use Automatic Gain Controller (AGC) circuit using commercially available IC and it will be placed at analog front-end receiver side. AGC can self-adjust its gain according to the input signal amplitude.  We also design analog filter to eliminate all interferences noise spectrum which is existed under 50 KHz. We design both circuits, analog filter and AGC in VLC receiver system with low-cost. The test data are obtained through the simulation and achieved good results in ideal condition.</p>

Analog and LabView-Based Control of a Maglev System With NI-ELVIS

2005 ◽  
Author(s):  
R. Sinha ◽  
M. L. Nagurka
Keyword(s):  
Analog Circuits ◽  
Magnetic Levitation ◽  
Control Strategies ◽  
Low Cost ◽  
Vertical Axis ◽  
Electromagnetic Coil ◽  
Maglev System ◽  
Analog Control ◽  
Acquisition Device ◽  
Control Circuits

This paper investigates the control of a low cost vertical-axis maglev system for mechatronics and controls education. The tabletop maglev system consists of an electromagnetic coil that levitates a ferrous object using an infrared sensor to determine the object’s position. Based on the sensor output, the controller adjusts the coil current, thus changing the magnetic field controlling the levitated object’s position. A second electromagnetic coil is used to provide known disturbances. The paper develops the underlying theory for magnetic levitation and presents the results of experiments with classical controllers implemented both as analog circuits and in software-based virtual instruments. Analog controllers, such as PID-type controllers, were implemented as simple circuits on National Instruments’ Educational Laboratory Virtual Instrumentation Suite (NI-ELVIS) prototyping board. NI-ELVIS offers a LabVIEW-based prototyping environment for readily experimenting with different controller circuits. It consists of a multi-function data acquisition device and a custom-designed bench-top workstation with a prototyping board. In addition to analog control circuits, a suite of LabVIEW-based controllers were developed which offer in software a rapid way to change control strategies and gains and explore the effect on the physical system.

Decomposition of the metastable beta titanium alloy Ti-15-3

1983 ◽  
Vol 41 ◽  
pp. 264-265
Author(s):  
Y. L. Chen ◽  
S. Fujlshiro
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Alpha Phase ◽  
Thick Sheet ◽  
Omega Phase ◽  
Beta Titanium Alloy ◽  
Beta Titanium ◽  
Beta Matrix ◽  
Metastable Beta ◽  
Very High

Metastable beta titanium alloys have been known to have numerous advantages such as cold formability, high strength, good fracture resistance, deep hardenability, and cost effectiveness. Very high strength is obtainable by precipitation of the hexagonal alpha phase in a bcc beta matrix in these alloys. Precipitation hardening in the metastable beta alloys may also result from the formation of transition phases such as omega phase. Ti-15-3 (Ti-15V- 3Cr-3Al-3Sn) has been developed recently by TIMET and USAF for low cost sheet metal applications. The purpose of the present study was to examine the aging characteristics in this alloy.The composition of the as-received material is: 14.7 V, 3.14 Cr, 3.05 Al, 2.26 Sn, and 0.145 Fe. The beta transus temperature as determined by optical metallographic method was about 770°C. Specimen coupons were prepared from a mill-annealed 1.2 mm thick sheet, and solution treated at 827°C for 2 hr in argon, then water quenched. Aging was also done in argon at temperatures ranging from 316 to 616°C for various times.

Chromic Acid Etching of Polyethylene

1973 ◽  
Vol 31 ◽  
pp. 72-73
Author(s):  
J. D. Muzzy ◽  
R. D. Hester ◽  
J. L. Hubbard
Keyword(s):  
Chromic Acid ◽  
Low Cost ◽  
Acid Etching ◽  
Crystalline Morphology ◽  
Bulk Specimen ◽  
Morphological Studies ◽  
Perfect Form ◽  
Molecular Length ◽  
Lamellar Texture ◽  
Cost Studies

Polyethylene is one of the most important plastics produced today because of its good physical properties, ease of fabrication and low cost. Studies to improve the properties of polyethylene are leading to an understanding of its crystalline morphology. Polyethylene crystallized by evaporation from dilute solutions consists of thin crystals called lamellae. The polyethylene molecules are parallel to the thickness of the lamellae and are folded since the thickness of the lamellae is much less than the molecular length. This lamellar texture persists in less perfect form in polyethylene crystallized from the melt.Morphological studies of melt crystallized polyethylene have been limited due to the difficulty of isolating the microstructure from the bulk specimen without destroying or deforming it.

Sign in / Sign up

Export Citation Format

Share Document