• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
ECE 3155 Experiment V DC Power Supplies
ECE 3155 Experiment V DC Power Supplies

True Three Phase TF Turn Ratio Tester 400kV
True Three Phase TF Turn Ratio Tester 400kV

... of charge & will be planned soon after the supplies are made so as to make use of the testing equipments. Apart from the detailed demonstration at site, the supplier shall also have to arrange necessary training to HVPNL engineers. ...
How to Change the LD Module in an LMV1000 with...
How to Change the LD Module in an LMV1000 with...

... How to Change the LD Module in an LMV1000 with ProLase XP As the LD Module in an LMV1000 starts to age, there will come a time when the available output power will not be sufficient enough to mark your materials. Once this point is reached, the LD Module will need to be replaced. Miyachi Unitek offe ...
Document
Document

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

... harmonic components generated by the load but phase shifted by 180o. This standard is appropriate to any type of load considered a harmonic source. Furthermore, with a suitable control technique, the active power filter can also reward the load power factor. In this way, the power allocation system ...
BL34395398
BL34395398

... throughout this paper. All comparisons are done with Base case. Transistor sizes are specified as a ratio of WidthlLength (W/L). It is observed in the conventional adder circuit that the transistor ratio of PMOS to NMOS is 2 for an inverter. Further, power gating technique is used to reduce the leak ...
University of LeicesterPLUMERef: PLM-PAY-LabElecsGain-014
University of LeicesterPLUMERef: PLM-PAY-LabElecsGain-014

∑ ∑ ∑ ∫ ∫ ∑ ∑
∑ ∑ ∑ ∫ ∫ ∑ ∑

... Advantage of zero switching of power supply voltage is not necessary more closely describing. There is elimination of problem higher harmonics of current and voltage, and arising back influence of system to power supply and too disturbance of electrical systems and control systems [2] [4]. Problems ...
3A Linear Regulator Can Be Easily Paralleled to Spread Power and
3A Linear Regulator Can Be Easily Paralleled to Spread Power and

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-ISSN: 2278-1676,p-ISSN: 2320-3331,

... Enhancement of Voltage Stability in Power System Using Unified Power Flow Controller line q`. Although the reactive power is internally generated /absorbed by the series converter, the real-power generation/absorption is made feasible by the DC energy storage device-that is, the capacitor [5]. The ...
here - Magnolia Intertie
here - Magnolia Intertie

Fuji Electric UPS7000HX-T3U (300, 400, and 500kVA) 480V 3
Fuji Electric UPS7000HX-T3U (300, 400, and 500kVA) 480V 3

proceedings - CERN Indico
proceedings - CERN Indico

... and features a manual reset button, status and alarm LEDs and a series of status and alarm test points for each PSU. Figure 3 shows two PSMs lodged inside one crate. The back side of each PSM is connected to an extension board (“back board” fig. 4), which holds the connectors for the power cables, H ...
Lecture 15 - UniMAP Portal
Lecture 15 - UniMAP Portal

... Most larger users of electrical energy pay for the apparent power demand rather than the watts dissipated since the volt-amperes used are sensitive to the reactive power requirement. The closer the power factor of an industrial consumer is to 1, the more efficient is the plant’s operation since it ...
A Novel Improved Performance of Direct Power Control of Unified
A Novel Improved Performance of Direct Power Control of Unified

Electric Power Quality : Types , and Measurements
Electric Power Quality : Types , and Measurements

... Disturbance analyzers and disturbance monitors form a category of instruments which have been developed specifically for power quality measurements. They typically can measure a wide variety of system disturbances from very short duration transient voltages to long duration outages or undervoltages. ...
2SC0435T2F1-17 Datasheet
2SC0435T2F1-17 Datasheet

... The average supply input current is limited for thermal reasons. Higher values than specified by the absolute maximum rating are permissible (e.g. during power supply start up) if the average remains below the given value, provided the average is taken over a time period which is shorter than the th ...
Power Measurements - Spectrum Instrumentation
Power Measurements - Spectrum Instrumentation

... Figure 2 shows the resulting measurement from Spectrum’s SBench 6 software which is used to control and process the acquired data. The input voltage is measured differentially with the two passive probes connected to channels Ch2 and Ch3. The channels are combined and show as channel Ch2 in the top ...
SiGe W-CDMA Transmitter for Mobile Terminal Application , Member, IEEE Victoria Pereira
SiGe W-CDMA Transmitter for Mobile Terminal Application , Member, IEEE Victoria Pereira

... signals. Both mixers are biased via a bandgap, supplying temperature and power-supply independent reference current to the nFET (N5–N8) current sources. A combination of n-p-ns and field-effect transistors (FETs) are used to enhance and optimize noise and linearity performance for low current consum ...
ACES-Power-existing
ACES-Power-existing

... Power in the trackers Power in the calorimeters Need for changes ...
Nptel Reference
Nptel Reference

2SC0435T2H0-17 Datasheet
2SC0435T2H0-17 Datasheet

Dr. Sahar Abd El Moneim Moussa - Pharos University in Alexandria
Dr. Sahar Abd El Moneim Moussa - Pharos University in Alexandria

POWER ELECTRONICS TECHNOLOGY
POWER ELECTRONICS TECHNOLOGY

CL800 • CL1200 • CL1600 • CL2000
CL800 • CL1200 • CL1600 • CL2000

... CLASS - H TECHNOLOGY With this technology, two different power supply rails are permanently available internally to the power amplifier blocks. For most of the program material, the lower operating voltage is able to reproduce the audio signal flawlessly; however, as soon as there are dynamic peaks, ...
< 1 ... 202 203 204 205 206 207 208 209 210 ... 316 >

Decibel

The decibel (dB) is a logarithmic unit that expresses the ratio of two values of a physical quantity, often power or intensity. One of these quantities is often a reference value and in this case the decibel expresses the absolute level of the physical quantity. The number of decibels is ten times the logarithm to base 10 of the ratio of two power quantities, or of the ratio of the squares of two field amplitude quantities. One decibel is one tenth of one bel, named in honor of Alexander Graham Bell; however, the bel is seldom used.The definition of the decibel is based on the measurement of power in telephony of the early 20th century in the Bell System in the United States. Today, the unit is used for a wide variety of measurements in science and engineering, most prominently in acoustics, electronics, and control theory. In electronics, the gains of amplifiers, attenuation of signals, and signal-to-noise ratios are often expressed in decibels. The decibel confers a number of advantages, such as the ability to conveniently represent very large or small numbers, and the ability to carry out multiplication of ratios by simple addition and subtraction. By contrast, use of the decibel complicates operations of addition and subtraction.A change in power by a factor of 10 is a 10 dB change. At the half power point an audio circuit or an antenna exhibits an attenuation of 3dB. A change in voltage by a factor of 10 results in a change in power by a factor of 100, which is a 20 dB change. A change in voltage ratio by a factor of two approximately corresponds to a 6 dB change.The decibel symbol is often qualified with a suffix that indicates the reference quantity that has been used or some other property of the quantity being measured. For example, dBm indicates a reference power of one milliwatt, while dBu is referenced to approximately 0.775 volts RMS.In the International System of Quantities, the decibel is defined as a unit of measurement for quantities of type level or level difference, which are defined as the logarithm of the ratio of power- or field-type quantities.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report