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DAC7512 - Texas Instruments
DAC7512 - Texas Instruments

... SCLK, and DIN), which is compatible with SPI, QSPI, and Microwire interface standards as well as most Digital Signal Processors (DSPs). See the Serial Write Operation timing diagram for an example of a typical write sequence. The write sequence begins by bringing the SYNC line LOW. Data from the DIN ...
DMMT3904W Features Mechanical Data
DMMT3904W Features Mechanical Data

... indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more U ...
TPS78225-Q1 数据资料 dataSheet 下载
TPS78225-Q1 数据资料 dataSheet 下载

... As with any regulator, increasing the size of the output capacitor reduces over/undershoot magnitude but increases duration of the transient response. ...
Current Draft
Current Draft

... and/or wasted. With renewable and efficient energy becoming a strong focus for many groups, having homeowners more aware and alert would help to the cause as it would cut down energy consumption. While other prototypes of this system have more than likely been attempted and completed several times o ...
Interface Between Process Equipment And Process Bus for Light
Interface Between Process Equipment And Process Bus for Light

... challenges for the engineers. The IEC 61850 standard defines the most advanced techniques towards the digital substation development. It describes the communication mappings for the substation automation of both conventional and digital substations. The most important challenge is to replace old suc ...
NCP4326 - Switchmode Power Supply Controller
NCP4326 - Switchmode Power Supply Controller

... device actuates two independent switches that precisely adjust the considered outputs to resistor−selectable voltages. This controller also integrates a precision reference voltage, which together with a dedicated operational amplifier reduces the feedback loop elements to the minimum. In the end th ...
Atmel AVR042: AVR Hardware Design Considerations 8-bit Atmel
Atmel AVR042: AVR Hardware Design Considerations 8-bit Atmel

... capacitor from the RESET pin to ground. This is not directly required since the AVR internally have a low-pass filter to eliminate spikes and noise that could cause reset. Applying an extra capacitor is thus an additional protection. However, note that this capacitor cannot be present if debugWIRE o ...
Performance Analysis of Voltage Scaled Low Power Clock
Performance Analysis of Voltage Scaled Low Power Clock

LP2998/LP2998-Q1 DDR Termination
LP2998/LP2998-Q1 DDR Termination

... The purpose of the sense pin is to provide improved remote load regulation. In most motherboard applications the termination resistors will connect to VTT in a long plane. If the output voltage was regulated only at the output of the LP2998 then the long trace will cause a significant IR drop result ...
Loudspeakers: Effects of amplifiers
Loudspeakers: Effects of amplifiers

HV9921/HV9922/HV9923 3-Pin Switch-Mode LED Lamp Driver ICs Features Description
HV9921/HV9922/HV9923 3-Pin Switch-Mode LED Lamp Driver ICs Features Description

... The HV9921/22/23 are PWM peak current controllers designed to control a buck converter topology in continuous conduction mode (CCM). The output current is internally preset at 20mA for HV9921, 50mA for HV992, and 30mA for HV9923. When the input voltage of 20 to 400V appears at the DRAIN pin, the int ...
Series MICI 80 • 180 • 200
Series MICI 80 • 180 • 200

... Series MICI 80 • 180 • 200 Micrometer screw piezo drive Concept: The elements of the series MICI are well suited for improving the positioning accuracy of linear stages. They are piezoelectrical actuators which, in combination with micrometer screws, are mounted onto a linear stage. Preadjustment is ...
Technical recommendation for the purchase of EAVC for HV systems
Technical recommendation for the purchase of EAVC for HV systems

Low noise cryogenic electronics : preamplifier - CEA-Irfu
Low noise cryogenic electronics : preamplifier - CEA-Irfu

WINDY BOY 2500 / 3000
WINDY BOY 2500 / 3000

... Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Area of validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Additional Information . . . . . . . ...
S275-10-1 (Discontinued Product)
S275-10-1 (Discontinued Product)

... Trip Control. When the selected minimum-trip current value is exceeded, and after a time delay, the control sends a trip signal to the interrupter operating mechanim. Control operating power is also obtained from the BCT’s; thus no external power is required for timing or trip functions. The control ...
250MHz to 4000MHz Dual, Analog Voltage Variable Attenuator MAX19790 General Description Features
250MHz to 4000MHz Dual, Analog Voltage Variable Attenuator MAX19790 General Description Features

... high-impedance load (> 50kI). It is suggested that a current-limiting resistor be included in series with this ...
LINECODE Object
LINECODE Object

... Xmatrix = "3, 11, 12, 13 , 21, 22, 23 , 31, 32, 33" This is analagous to how one might do it if one were designing a binary transfer scheme. An alternative is to require that the order be defined elsewhere and we could leave it out of the array. However, I would personally like each property to stan ...
FDS6982AS Dual Notebook Power Supply N-Channel PowerTrench SyncFET
FDS6982AS Dual Notebook Power Supply N-Channel PowerTrench SyncFET

... Fairchild’s SyncFET process embeds a Schottky diode in parallel with PowerTrench MOSFET. This diode exhibits similar characteristics to a discrete external Schottky diode in parallel with a MOSFET. Figure 23 shows the reverse recovery characteristic of the FDS6982AS. ...
NGG NGB Circuit Breakers File size 1.1MB
NGG NGB Circuit Breakers File size 1.1MB

A Two-Dimensional Laser Scanning Mirror Using Motion
A Two-Dimensional Laser Scanning Mirror Using Motion

... 2-D scanning mirror systems have been widely used in commercial and industrial fields such as barcode reading systems, display projectors, optical sensors and display devices. In a two-dimensional (2-D) scanning mirror system, an optical mirror is rotated about two orthogonal axes to reflect a light ...
The Service Entrance - Goodheart
The Service Entrance - Goodheart

... A structure can have only one service. Thus, each building will have one service drop or one service lateral. While this is the basic rule, there are some practical exceptions. The following exceptions are allowed: • A completely separate service is permitted to supply a fire pump or other emergency ...
MO-201 Electric Power Distribution Systems
MO-201 Electric Power Distribution Systems

LTC2471/LTC2473 - Linear Technology
LTC2471/LTC2473 - Linear Technology

II. proposed ELECTRONIC BALLAST
II. proposed ELECTRONIC BALLAST

... extinguishes in the lamp. The same analysis will be applied in this work to define the appropriate OFF time for rapid cycle test for T5 fluorescent lamp. The OFF time for rapid cycle test is determined by how long electrode temperature takes to stabilize. From three of the major lamp manufacturers, ...
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Variable-frequency drive



A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.
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