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Lecture 8
Lecture 8

Phasors on rectangular
Phasors on rectangular

... A phasor or a vector is a quantity that can be described by two numbers which represents its magnitude and direction. Thus it can be drawn as a directed line segment of arrow. The difference between phasor and vector comes about as a result of direction. In a vector, the direction is oriented in spa ...
Off-line high voltage converters
Off-line high voltage converters

Realization of 476 MHz pulse power cavity amplifier using
Realization of 476 MHz pulse power cavity amplifier using

... The amplifier is biased to operate in class AB 1 mode for achieving maximum power output for a given value of the max cathode current. As control grid is grounded for DC, the cathode is biased at +60V for the required control grid to cathode voltage of -60V as obtained from the simulation results. ...
MAX8513/MAX8514 Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset General Description
MAX8513/MAX8514 Wide-Input, High-Frequency, Triple-Output Supplies with Voltage Monitor and Power-On Reset General Description

... Current limiting is accomplished by inductor current sensing for improved efficiency, or by an external sense resistor for better accuracy. The MAX8513/MAX8514s’ first LDO controller is designed to provide a low-cost, high-current regulated output from 0.8V to 5.5V using an N-channel MOSFET or a low ...
2W Constant Output Power Class-D Audio Amplifier with Adaptive
2W Constant Output Power Class-D Audio Amplifier with Adaptive

... Many audio analyzers will not give the correct readings on a Class-D amplifier without additional filtering, even if they have an internal low-pass filter. A RC 30kHz low-pass filter (100-Ω, 47n-F) is implemented to reduce the remaining noise frequencies from the PWM carrier signal. This filter was ...
62 Answering AS questions on circuits.p65
62 Answering AS questions on circuits.p65

... an internal resistance. Internal resistance is the name given to the resistance to the flow of charge inside the terminals of the power supply. The power supply is best thought of as a perfect emf in series with this internal resistance inside the confines of the power supply as in the diagram below ...
MAX1875/MAX1876 Dual 180° Out-of-Phase PWM Step- Down Controllers with POR General Description
MAX1875/MAX1876 Dual 180° Out-of-Phase PWM Step- Down Controllers with POR General Description

... The MAX1875/MAX1876 dual, synchronized, step-down controller generates two outputs from input supplies ranging from 4.75V to 23V. Each output is adjustable from sub-1V to 18V and supports loads of 10A or higher. Input voltage ripple and total RMS input ripple current are reduced by synchronized 180° ...
ADR391 数据手册DataSheet 下载
ADR391 数据手册DataSheet 下载

Voltage Detector
Voltage Detector

Application Note for Flyback Converter Using the Primary
Application Note for Flyback Converter Using the Primary

... MOSFET designed for offline supplies within 5W output power. Typical applications include cell phone charges, adapters for handheld electronics, stand-by and auxiliary power supplies and LED driver and so on. The IC uses a variable off-time control method and it always operates in discontinuous cond ...
RA30H4047M1 数据资料DataSheet下载
RA30H4047M1 数据资料DataSheet下载

MAX1703 1-Cell to 3-Cell, High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter ________________General Description
MAX1703 1-Cell to 3-Cell, High-Power (1.5A), Low-Noise, Step-Up DC-DC Converter ________________General Description

... DC-DC converter intended for use in battery-powered wireless applications. It uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate a 2.5V to 5.5V output from battery inputs, such as one to three NiCd/NiMH cells or one Li-Ion cell. The device includes a 2A, 75mΩ, N-cha ...
Ch 26 Current and Resistance
Ch 26 Current and Resistance

... but they tend to drift with a drift speed vd in the direction opposite that of the applied electric field that causes the current. The drift speed is tiny compared with the speeds in the random motion. In the figure, the equivalent drift of positive charge carriers is in the direction of the applied ...
Reference 600 Product Brochure
Reference 600 Product Brochure

Limiting short-circuit currents in medium-voltage
Limiting short-circuit currents in medium-voltage

... large sites to that for small sites, there are several additional transformers which, together with their dedicated switchgear, greatly increases the amount of space required for the electrical distribution system equipment. The advantage of this system is however, the use of standard electrical equ ...
Zero-power off-line high voltage converter
Zero-power off-line high voltage converter

LMP848x-Q1 Automotive, 76-V, High-Side, High
LMP848x-Q1 Automotive, 76-V, High-Side, High

... The LMP8480-Q1 and LMP8481-Q1 supply voltage does not have to be larger than the load source voltage. A 76-V load source voltage with a 5-V supply voltage is perfectly acceptable. 8.1.1 Theory of Operation The LMP8480-Q1 and LMP8481-Q1 are comprised of two main stages. The first stage is a different ...
Discrete Input Source and Isolated Modules
Discrete Input Source and Isolated Modules

Features General Description
Features General Description

... resistive load to the AC line. For a resistor, the current drawn from the line is in phase with and proportional to the line voltage, so the power factor is unity (one). A common class of nonlinear load is the input of most power supplies, which use a bridge rectifier and capacitive input filter fed f ...
MAX8586 Single 1.2A USB Switch in 3mm x 3mm TDFN General Description
MAX8586 Single 1.2A USB Switch in 3mm x 3mm TDFN General Description

... Do not use RISET values below 26kΩ because the maximum current rating of the device may be exceeded. RISET values larger than 60kΩ are not recommended and do not provide a lower limit current than 500mA. If the output drops below 1V (typ), the MAX8586 shifts to a short-circuit current-limit threshol ...
BEHInD THE SCEnES WE PLaY a MaJOR ROLE PRECISIOn
BEHInD THE SCEnES WE PLaY a MaJOR ROLE PRECISIOn

... Unifying shunt and electronics is another strong competence of Isabellenhütte. The best results are achieved when the shunt and the electronics are directly soldered together – here Isabellenhütte applies its own patented procedure. Furthermore, we take care that the sensor is prepared for variation ...
STL70N4LLF5
STL70N4LLF5

... VDD=15 V, ID= 9A, RG=4.7 Ω, VGS=10 V (see Figure 13) ...
CN3083 Li-Ion battery charger data sheet
CN3083 Li-Ion battery charger data sheet

INDUCTIVE CURRENT SENSOR BASED ON NANOCRYSTALLINE ALLOYS Euler C.T. Macedo
INDUCTIVE CURRENT SENSOR BASED ON NANOCRYSTALLINE ALLOYS Euler C.T. Macedo

... Companhia Hidroeletrica do São Francisco – CHESF, Recife, Brazil, [email protected]. ...
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Current mirror

A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being 'copied' can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits. It can also be used to model a more realistic current source (since ideal current sources don't exist).The circuit topology covered here is one that appears in many monolithic ICs. It is a Widlar mirror without an emitter degeneration resistor in the follower (output) transistor. This topology can only be done in an IC as the matching has to be extremely close and cannot be achieved with discretes.Another topology is the Wilson mirror. The Wilson mirror solves the Early effect voltage problem in his design.
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