• 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
BOSS FZ-5 Owners Manual
BOSS FZ-5 Owners Manual

... Panel Descriptions line voltage be interrupted due to a power blackout or power cord disconnection. ...
Center Boosted Sinusoidal Pulse Width Modulation for Three Phase
Center Boosted Sinusoidal Pulse Width Modulation for Three Phase

Study of Cellphone Chargers
Study of Cellphone Chargers

... phone. They are notoriously diverse, having a wide variety of DC connector-styles and voltages, most of which are not compatible with other manufacturers' phones or even different models of phones from a single manufacturer. Cellphone chargers are nothing but AC to DC converters. They take an input ...
Low Frequency AC Transmission System
Low Frequency AC Transmission System

Appl. Phys. Lett. 104, 014104 (2014)
Appl. Phys. Lett. 104, 014104 (2014)

Advanced Lab Course Impedance Spectroscopy M208 Content
Advanced Lab Course Impedance Spectroscopy M208 Content

... Impedance spectroscopy is a standard technique to characterize electrical systems. In this work a special, more sophisticated kind of impedance spectroscopy will be used: The FFTimpedance spectroscopy. This technique is useful in those cases where the speed is of importance, i.e. where the system is ...
Analysis of Dynamic Power Factor Correction Using Flexible
Analysis of Dynamic Power Factor Correction Using Flexible

Critical Points of Simplified Model for Ferroresonance Phenomenon in Single Phase Power Transformers
Critical Points of Simplified Model for Ferroresonance Phenomenon in Single Phase Power Transformers

... computation requirements, the critical points required for frerroresonance of power transformer  The calculated primary voltage and current due to ferroresonance agreed with those measured experimentally with a deviation not exceeding 7%. ...
Part 1: Harmonics
Part 1: Harmonics

... Resolution of AD-converter: Required measurement accuracy 5% With Lvalue (H40) = 0.23 A * 8/40 = 0.046 A Minimal current value to be measured => 0.046 / 20 = 0.0023 A This will result in: For an estimated current measuring range of 50A => 50 A/ 0.0023 A = 21,740 => 215 or in more practical terms: AD ...
SOUNDCRAFT CPS250 CPS275 Console Power Supply
SOUNDCRAFT CPS250 CPS275 Console Power Supply

Lecture 2: Electrical Measurements 2.1 Introduction 2.2 Voltage
Lecture 2: Electrical Measurements 2.1 Introduction 2.2 Voltage

Power Quality Improvement through Unified power quality
Power Quality Improvement through Unified power quality

INSTRUCTION MANUAL OPTICAL INTERFACE UNIT (CROSS
INSTRUCTION MANUAL OPTICAL INTERFACE UNIT (CROSS

Aalborg Universitet
Aalborg Universitet

... interface converter (e.g. an inverter in case of dc-to-ac conversion) to the power distribution system (microgrid or utility grid). The main role of this inverter is to control voltage amplitude and phase angle in order to inject the active and reactive power. In addition, compensation of power qual ...
On the Ongoing Evolution of Very High Frequency Power Supplies
On the Ongoing Evolution of Very High Frequency Power Supplies

TGA4541-SM初步数据资料DataSheet下载
TGA4541-SM初步数据资料DataSheet下载

... herein is provided "AS IS, WHERE IS" and with all faults, and the entire risk associated with such information is entirely with the user. All information contained herein is subject to change without notice. Customers should obtain and verify the latest relevant information before placing orders for ...
RG3 - T4 - Siemens
RG3 - T4 - Siemens

Power Supply Rejection for Low Jitter Clocks
Power Supply Rejection for Low Jitter Clocks

... Figure 6. Sideband Spurious Measurement Example Relative power is expressed in decibels (dB) relative to the output frequency (carrier) with units expressed as dBc (decibels relative to the carrier power). Because the limiting amplifier removes most of the amplitude noise and interference, it can be ...
JN3616501653
JN3616501653

... side. This presents a particular problem for the power companies, because they cannot compensate for the harmonic current by adding simple capacitors or inductors, as they could for the reactive power drawn by a linear load. Many jurisdictions are using power factor correction for all power supplies ...
EB25778783
EB25778783

... in some central substations to manage power flows of multilines or a group of lines and provide voltage support as well. By using GUPFC devices, the transfer capability of transmission lines can be increased significantly. Furthermore, by using the multilinemanagement capability of the GUPFC, active ...
Multi Look-Up Table Digital Predistortion for RF Power Amplifier Linearization Ph.D. Thesis
Multi Look-Up Table Digital Predistortion for RF Power Amplifier Linearization Ph.D. Thesis

... the PA polynomial model) appears as the most critical issue regarding linearity, because their frequency (intermodulation) components are too close to the desired signals that can not be removed by filtering. Thus the use of linearizers is justified because represent a good alternative in order to m ...
LX-218A - DAS Audio
LX-218A - DAS Audio

noise analysis process
noise analysis process

AN91 - Low Cost Coupling Methods for RF Power Detectors Replace Directional Couplers
AN91 - Low Cost Coupling Methods for RF Power Detectors Replace Directional Couplers

The Intersil ICL7107 is high performance Included are seven
The Intersil ICL7107 is high performance Included are seven

... up to de-integrate a positive signal but lose charge (decrease voltage) when called up to deintegrate a negative input signal. This difference in reference for positive or negative input voltage will give a roll-over error. However, by selecting the reference capacitor such that it is large enough i ...
< 1 ... 153 154 155 156 157 158 159 160 161 ... 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