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Project report
Project report

... The low threshold voltage transistors are power gated, i.e., they are stacked in series with high threshold voltage devices, called gating transistors that connects them to the power supply and the ground. The gating transistors are turned on during the active mode and are turned off during the slee ...
Source Transformations
Source Transformations

Vision™ OPLC™ V350-35-TR20/V350-J-TR20
Vision™ OPLC™ V350-35-TR20/V350-J-TR20

...  A clamping diode in parallel with each inductive DC load  An RC snubber circuit in parallel with each inductive AC load npn Outputs ...
ADL5380 数据手册DataSheet 下载
ADL5380 数据手册DataSheet 下载

... decoupled to the board ground using appropriate-sized capacitors. o a low impedance ground plane. Do not connect these pins. Enable Control. current. The default setting for this pin is open. Local Oscillator Input. Pins must be ac-coupled. A differential drive through a balun (recommended balun is ...
How Motors Operate Presented by John Freeland
How Motors Operate Presented by John Freeland

... Relatively inexpensive solid state controls are available to convert single phase power to three phase power with variable frequency and voltage (speed controls) ...
SECO Catalog 2009
SECO Catalog 2009

... Trigger level and sensitivity adjustable. Video Loss Detection: Programmable. ...
1_Voltammetry
1_Voltammetry

Lecture14: AC Circuits , Resonance
Lecture14: AC Circuits , Resonance

... • Resistors always dissipate power, but the instantaneous rate varies as i2(t)R • No power is lost in pure capacitors and pure inductors in an AC circuit – Capacitor stores energy during two 1/4 cycle segments. During two other segments energy is returned to the circuit – Inductor stores energy when ...
File - SEVIER COUNTY AMATEUR RADIO CLUB
File - SEVIER COUNTY AMATEUR RADIO CLUB

... The advantage of having multiple receive bandwidth choices on a multimode transceiver will permit noise or interference reduction by selecting a bandwidth matching the mode. T4B9 2400 Hz is an appropriate receive filter to select in order to minimize noise and interference for SSB reception. T4B8 ...
Electricity Training Course
Electricity Training Course

...  Explain how to test diodes, both with an analog meter and a digital meter.  Explain how to test NPN and PNP transistors.  Explain how to test silicon-controlled rectifiers (SCRs).  Explain how to test triacs.  Describe the effects that electrostatic discharge (ESD) can have on electronic compo ...
49_PT1
49_PT1

...  Introduction With this power tap you can insert, pick-up or monitor the in-line power source. For application in CATV, SMATV, MMDS, satellite ...etc. systems. The PT1-123 power tap features : 1. Lowest insertion loss, signal-through-loss reduced to a minimum. ...
EE 4BD4 Lecture 20 - McMaster University
EE 4BD4 Lecture 20 - McMaster University

... tissue impedance) • Constant current (more modern) • Typical pulse durations are 50 µs to 200 µs (some applications use 1 ms and longer • Cardiac or smooth muscle require these longer durations because membrane gates take longer to depolarize • Implantable constant current stimulators can deliver ma ...
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PEO-Underpinning-Knowledge-Questions-Power

Chapter 26 DC Circuits
Chapter 26 DC Circuits

... Parallel The current through each resistor is the same; the voltage depends on the resistance. The sum of the voltage drops across the resistors equals the battery ...
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84` IIB

... A student is now given two light-dependent resistors (LDRs) and a small d.c. buzzer. The buzzer can be connected to the output of the circuit in Figure 9 and emits a loud noise when the output is high but no noise when it is low. The student is asked to add the two LDRs and the buzzer to the circuit ...
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A Sub 1-V Constant Gm–C Switched

... the differential pair. As a practical matter, good results are obtained even if the bias points are not identical. Of course there are countless ways of using feedback and transistors biased at different current densities to produce this same type of result. One advantage of the topology in Fig. 4 i ...
SUPPORT BOOKLET FOR UNIT 1
SUPPORT BOOKLET FOR UNIT 1

... behaving as a switch, so enabling logic gates to control high power devices. The advantages and disadvantages of modern MOSFETs over transistors become apparent with practical applications. With the addition of transistors and MOSFET devices to electronic systems, large currents can be controlled an ...
Radio Crane Control Systems - Hubbell Industrial Controls
Radio Crane Control Systems - Hubbell Industrial Controls

... offers fast, responsive operation. • Frequency Conservation — Up to four systems can share the same radio frequency, which also saves on spare parts requirements. ...
LT3748 – 100V Isolated Flyback Controller
LT3748 – 100V Isolated Flyback Controller

DS1250Y/AB 4096k Nonvolatile SRAM FEATURES PIN ASSIGNMENT
DS1250Y/AB 4096k Nonvolatile SRAM FEATURES PIN ASSIGNMENT

... going low to the earlier of CE or WE going high. 4. tDH, tDS are measured from the earlier of CE or WE going high. 5. These parameters are sampled with a 5 pF load and are not 100% tested. 6. If the CE low transition occurs simultaneously with or latter than the WE low transition, the output buffers ...
LMV331-Q1 数据资料 dataSheet 下载
LMV331-Q1 数据资料 dataSheet 下载

... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant ...
G201 STEP MOTOR DRIVE
G201 STEP MOTOR DRIVE

... this reduced current range. (3) NEMA-42 MOTOR: Use this option if the drive is to be used with NEMA-42 frame size motors. This option adjusts the midband compensation circuit for optimum performance with this size motor. (4) MID-BAND COMPENSATION DISABLE: Some step pulse sources generate very “ragge ...
JLS Signal Generator
JLS Signal Generator

... Propagation Delay • Propagation delay is the time it takes a signal to pass through a circuit to produce a result. • JLS takes propagation delay into account when logic gates are placed within the computer assisted design area or sandbox. • If you utilize many different gates and do not account for ...
International Journal of Electrical, Electronics and Computer
International Journal of Electrical, Electronics and Computer

16890_chapter-21-zener-diodes
16890_chapter-21-zener-diodes

< 1 ... 1175 1176 1177 1178 1179 1180 1181 1182 1183 ... 2646 >

Switched-mode power supply



A switched-mode power supply (switching-mode power supply, switch-mode power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. Like other power supplies, an SMPS transfers power from a source, like mains power, to a load, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Ideally, a switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be substantially smaller and lighter than a linear supply due to the smaller transformer size and weight.Switching regulators are used as replacements for linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated; their switching currents can cause electrical noise problems if not carefully suppressed, and simple designs may have a poor power factor.
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