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MAX2240 2.5GHz, +20dBm Power Amplifier IC in UCSP Package General Description
MAX2240 2.5GHz, +20dBm Power Amplifier IC in UCSP Package General Description

... D0 and D1. Each current level presents a different power level to the final amplifier stage, therefore controlling the output power. The digital power control circuit of the PA greatly simplifies control of the output power. The two digital bits D0 and D1 control the output power in four steps with ...
Automatic Meter Reading
Automatic Meter Reading

Development of High Voltage Surge Limiting Resistor for
Development of High Voltage Surge Limiting Resistor for

... The surge protection scheme for the rectifier stacks of 3MV multiplier should be able to limit the surge current to 20A @ 8.33ms and absorb the surge energy of 150J for 100ms. Due to conditional sparking between two consecutive rectifier stack, 0.7A current flows through stack, these causes the dip ...
DC-DC Converters Via MATLAB/SIMULINK
DC-DC Converters Via MATLAB/SIMULINK

... must be represented as ideal components (zero ON voltages, zero OFF currents, zero switching times). Therefore, auxiliary binary variables can be used to determine the state of the switches. It must be ensure that the equations obtained by the use of Kirchhoff's laws should include all the permissib ...
Variable- Voltage Techniques
Variable- Voltage Techniques

... a) Voltage schedule with a single voltage 4.0 V b) The voltage scheduling with 2.5 V and 5.0 V For both voltage schedules, a processor completes the program’s 1 billion cycles only at the timing constraint The x-, y-, and z-axes of the graphs indicate the execution cycles, the square of supply volta ...
PGA203 数据资料 dataSheet 下载
PGA203 数据资料 dataSheet 下载

... digital word to the gain select inputs. Table I shows the gains for the different possible values of the digital input word. The logic inputs are referred to their own separate digital common pin, which can be connected to any voltage between the minus supply and 8V below the positive supply. The ga ...
Document
Document

... Abstract-A single processor controls a three phase silicon controlled rectifier (SCR) power converter. An inexpensive, dual optoisolator interface to the power line provides noise rejection and an improved measure of the zero crossing. A dynamic digital phaselocked loop (PLL) algorithm implemented i ...
VS1011 to VS1053 Migration Guide
VS1011 to VS1053 Migration Guide

... At 2.5. . . 3.6 V, the VS1011’s analog voltage AVDD has stayed the same in VS1053 (unless you use the higher 1.65 V reference voltage REF, which makes the limits 3.3. . . 3.6 V, but most designs are easier with the default REF = 1.23 V). VS1011’s DVDD which was 2.3. . . 3.6 V has been replaced with ...
Magnetic Speed Switch Instructions
Magnetic Speed Switch Instructions

... and select a desired output. The exceptions are the stop switch models (*-SS) which have a built-in 4 second delay and can be connected to a relay. This device is not intended for use in hazardous areas as defined by the NEC, articles 500-504. Intrinsically safe Magnetic Speed Swtiches are not prese ...
Multimeter LDanalog 20
Multimeter LDanalog 20

... • In humid environments, no measurements must be carried out. Hands, shoes, the floor and the workplace have to be dry. • Make sure that in measurements according to CAT II or III (i.e. on circuits with direct electrical connection to the power supply system or in building installation) the nominal ...
Data Sheet
Data Sheet

... The EV kit is a fully assembled and tested circuit board that demonstrates the performance of the MAX17681 high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 3W. The EV kit generates either ±15V, 100mA or ±12V, 50mA output voltages from a 17V to 32V input supply. The ...
PC Power Supply Repair
PC Power Supply Repair

... check the collector-to-emitter resistance, then the collector-to-base resistance (Figure 4). If a short is found, replace both the transistor and the damper diode that’s across its emitter-collector. I normally use a Motorola MJE13009 for the power transistor and a 1N4937 for the damper diode. You s ...
Discontinued Product - Allegro Microsystems
Discontinued Product - Allegro Microsystems

... large portion of the offset is a result of the mismatching of these resistors. These devices use a proprietary dynamic offset cancellation technique, with an internal high-frequency clock to reduce the residual offset voltage of the Hall element that is normally caused by device overmolding, tempera ...
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Control of Transient Power during Unintentional Islanding of

RA03M8894M 数据资料DataSheet下载
RA03M8894M 数据资料DataSheet下载

... to guarantee the level of reliability typically deemed necessary for critical communications elements. Examples of critical communications elements would include transmitters for base station applications and fixed station applications that operate with long term continuous transmission and a higher ...
TPA6101A2 数据资料 dataSheet 下载
TPA6101A2 数据资料 dataSheet 下载

... (ESR) ceramic capacitor, typically 0.1 µF, placed as close as possible to the device VDD lead, works best. For filtering lower-frequency noise signals, a larger, aluminum electrolytic capacitor of 10 µF or greater placed near the power amplifier is recommended. midrail bypass capacitor, CB The midra ...
12 VOLT AC/DC POWER SUPPLY
12 VOLT AC/DC POWER SUPPLY

... the unit will not be damaged in shipment, observe the following rules: ...


... Note: In the hatched area, the specification of Ripple, Ripple Noise is different form other area. Point A(center of the Case) Fig. 3.1 ...
N-channel 900 V, 0.72 typ., 7 A MDmesh™ K5 Power MOSFET in a
N-channel 900 V, 0.72 typ., 7 A MDmesh™ K5 Power MOSFET in a

... ECOPACK® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com. ...
EEE 121-4246
EEE 121-4246

... The doubly-fed induction generator efficiency increases slightly with the generator speed. The relatively low efficiency of the doubly-fed induction generator is primarilydue to its small size. In large doubly-fed induction generators such as the onesused in wind turbines, the generator efficiency i ...
Micro_Turbines___which_is_right_for_you
Micro_Turbines___which_is_right_for_you

MAX8884Y/MAX8884Z 700mA DC-DC Step-Down Converters General Description
MAX8884Y/MAX8884Z 700mA DC-DC Step-Down Converters General Description

... The MAX8884Y/MAX8884Z step-down converters with dual low-dropout (LDO) linear regulators are intended to power low-voltage microprocessors, DSPs, camera and Wi-Fi modules, or other point of load applications in portable devices. These ICs feature high efficiency with small external component size. T ...
TS30041-42
TS30041-42

... The TS30041/42 current-mode synchronous step-down power supply product is ideal for use in the commercial, industrial, and automotive market segments. It includes flexibility to be used for a wide range of output voltages and is optimized for high efficiency power conversion with low RDSON integrate ...
PowerPoint
PowerPoint

Transformer Basics - Jefferson Electric
Transformer Basics - Jefferson Electric

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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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