• Study Resource
  • Explore
    • 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
Comprehensive Study of Forward and Fly Back Converter for
Comprehensive Study of Forward and Fly Back Converter for

... that when fly back converter operates independently. They can achieve better power factor with lower conversion efficiency whereas forward converter can able to achieve higher efficiency but having larger magnetizing offset current. Also has higher voltage stress. This entire problem can be overcome ...
BD90610EFJ-C
BD90610EFJ-C

AN9405 - Intersil
AN9405 - Intersil

... diagram of the HIP4081A IC is shown in Figure 1. The HIP408x family of H-Bridge driver ICs provide the ability to operate from 10VDC to 80VDC busses for driving H-Bridges, whose switch elements are comprised of power N-Channel MOSFETs. The HIP408x family, packaged in both 20 pin DIP and 20 pin SOIC ...
SalizawatiShamsuddinMFKE2008 DU
SalizawatiShamsuddinMFKE2008 DU

... describes the basics of ferroresonance, characteristics and types of ferroresonance. Chapter 4 describes the methods that are used for the simulation. Therefore, all information related the simulation is explained in detail with the operation. Chapter 5 presents the circuits that were used in the si ...
BD6965NUX
BD6965NUX

Design Example –7.1.
Design Example –7.1.

... radio receivers tunable in a certain frequency range and as intermediate frequency (IF) amplifiers tuned to a fixed frequency. From 30s to 50s the RF amplifiers using electron tubes were one of the most important and interesting research area of the electronic engineering and investigated in depth. ...
2042 Cable Locator
2042 Cable Locator

SC190 - Semtech
SC190 - Semtech

VRM Thesis - bgavinsound.com
VRM Thesis - bgavinsound.com

LM5005 High Voltage 2.5 Amp Buck Regulator (Rev. E)
LM5005 High Voltage 2.5 Amp Buck Regulator (Rev. E)

90% Efficient Synchronous Boost Converter With 600
90% Efficient Synchronous Boost Converter With 600

12A High Efficiency Synchronous Point of Load Buck Regulator with
12A High Efficiency Synchronous Point of Load Buck Regulator with

... The LM21212-1 switching regulator features all of the functions necessary to implement an efficient low voltage buck regulator using a minimum number of external components. This easy to use regulator features two integrated switches and is capable of supplying up to 12A of continuous output current ...
EDM – Flushing
EDM – Flushing

industrial accelerometers
industrial accelerometers

... range. Typically the dynamic range is limited to +/- 5 VACPeak, but some 100 mV/g accelerometers are available with a dynamic range extended to +/- 8 VACPeak . If the nominal Bias voltage is 12 VDC, but can range from 10 – 14 VDC, The power supply must have greater potential than the Bias Voltage +/ ...
(DVR) Using Sinusoidal Pulse Width Modulation
(DVR) Using Sinusoidal Pulse Width Modulation

... The term Power Quality is something that tells about the quality of power. While "power quality" is a convenient term for many, it is the quality of the voltage rather than power or current that is actually described by the term in [1]. Ideally any electric utility is supposed to supply a pure sinus ...
FAN6747WALMY Highly Integrated Green-Mode PWM Controller
FAN6747WALMY Highly Integrated Green-Mode PWM Controller

Synchronous-Buck Power Stage (Rev. A)
Synchronous-Buck Power Stage (Rev. A)

... The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88. The junction-to-board thermal resistance is obtained by simulating in an environ ...
INA125 数据资料 dataSheet 下载
INA125 数据资料 dataSheet 下载

... Figure 1 shows the basic connections required for operation of the INA125. Applications with noisy or high impedance power supplies may require decoupling capacitors close to the device pins as shown. The output is referred to the instrumentation amplifier reference (IAREF) terminal which is normall ...
Electrical Discharge Machining
Electrical Discharge Machining

...  As the electric field is established between the tool and the job, the free electrons on the tool are subjected to electrostatic forces.  If the bonding energy of the electrons is less, electrons would be emitted from the tool.  Such emission of electrons are called or termed as ‘cold emission’. ...
RTU Zinatniskais raksts
RTU Zinatniskais raksts

... regimes as self start, reverse, repeated closing. Thus, there is an opportunity to get rotation frequency curves for any IM with different load factors and load torques without application of graphic and analytic methods. For mechanism exact stoppage it is important to know not only rotation frequen ...
General Description Features
General Description Features

... The MAX16833/MAX16833B–MAX16833D are peak current-mode-controlled LED drivers for boost, buckboost, SEPIC, flyback, and high-side buck topologies. A dimming driver designed to drive an external p-channel in series with the LED string provides wide-range dimming control. This feature provides extreme ...
ANALYSIS AND IMPLEMENTATION OF HIGH GAIN TWO INPUT
ANALYSIS AND IMPLEMENTATION OF HIGH GAIN TWO INPUT

... and which will reduce the cost and size of the converter topology. Many electrical systems in future will be supplied by two or more sources in order to increase the reliability, flexibility and more utilization of energy sources. Therefore two or more input sources must be combined to meet the futu ...
International Electrical Engineering Journal (IEEJ)
International Electrical Engineering Journal (IEEJ)

... MPF, and switched capacitor compensators are [2-4]. The active power filters (APF) can also be used for power factor correction and loss reduction [5, 6]. In this paper a low cost design based on SCCS family of devices developed by the First Author is validated through digital simulation using Matla ...
View a Sample Lesson  - Electrical Training Network
View a Sample Lesson - Electrical Training Network

... Some inductance is present in all electrical circuits. The inductance of most power system circuit wiring is small and generally only important in calculating available fault current. However, voltage and current relationships in AC circuits are affected by inductive loads such as discharge lamp bal ...
BDTIC CCM-PFC www.BDTIC.com/infineon ICE1PCS01
BDTIC CCM-PFC www.BDTIC.com/infineon ICE1PCS01

< 1 ... 92 93 94 95 96 97 98 99 100 ... 367 >

Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report