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High Performance Stepper Motor Drive Circuit (Rev. A)
High Performance Stepper Motor Drive Circuit (Rev. A)

SWD-119-PIN Quad Driver for GaAs FET Switches and Attenuators  Features
SWD-119-PIN Quad Driver for GaAs FET Switches and Attenuators Features

... 1. All voltages are relative to GND. 2. VOPT is grounded for most applications. To improve the intermodulation performance and the 1 dB compression point of GaAs control devices at low frequencies, VOPT can be increased to between 1.0 and 2.0V. The nonlinear characteristics of the GaAs control devic ...
Slide 1
Slide 1

... Light bulbs are sold by their wattage which is related to the power consumption of the bulb, and we buy lights with a higher wattage to get brighter lights. Light bulbs sold in the USA are intended for a 120 V parallel circuit, and in these circuits higher wattage means brighter bulbs. However, if y ...
modular dc power supply model 62000b series
modular dc power supply model 62000b series

Chapter 6 - An
Chapter 6 - An

... 1- The capacitors are replaced by effective shorts because their values are selected so that the capacitive resistance XC is negligible at the signal frequency and can be considered to be 0 Ω. * Note that C2 must be large enough so that XC2 is very small compared to RE ( ...
Review Sheet Chemistry Electrons and Bonding “Tuiz”
Review Sheet Chemistry Electrons and Bonding “Tuiz”

... 9. If a string of Christmas lights was wired to be a series circuit, and one of the lightbulbs burned out, what would happen to the rest of the bulbs? What would happen if it was wired in parallel? 10. What type of wiring (series/parallel) is our home, and how do we know? 11. Be able to work problem ...
MAX8526/MAX8527/MAX8528 1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators General Description
MAX8526/MAX8527/MAX8528 1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators General Description

... regulators operate from input voltages as low as 1.425V and are able to deliver up to 2A of continuous output current with a maximum dropout voltage of only 200mV. The output voltage can be set from 0.5V to (VIN - 0.2V) and is 1.4% accurate over load and line variations, from 0°C to +85°C. These reg ...
MAX1680/MAX1681 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters _______________General Description
MAX1680/MAX1681 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters _______________General Description

... recommended capacitors and their suppliers. Calculate the output ripple voltage as follows: VRIPPLE = [(IOUT) / (2 x fOSC x C2)] + 2 x (IOUT x ESRC2) where IOUT is the load current, fS is the charge pump’s operating frequency, C2 is the output capacitor, and ESRC2 is the output capacitor’s ESR. Tabl ...
Unit – iv
Unit – iv

... Idss = shorted -gate drain voltage Vgs = gate – source voltage Vgs (off) = gate –source cut off voltage FET AS A VOLTAGE –VARIABLE RESISTOR (VVR): FET is operated in the constant current portion of its output characteristics for the linear applications .In the region before pinch off , where Vds is ...
SS311PT|SS411P Bipolar Hall-Effect Digital Position Sensors with
SS311PT|SS411P Bipolar Hall-Effect Digital Position Sensors with

... Bipolar Hall-Effect Digital Position Sensors Figure 2. SS311PT Mounting/Tape and Reel Dimensions (For reference only. mm/[in]) ...
MAX761/MAX762 12V/15V or Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters
MAX761/MAX762 12V/15V or Adjustable, High-Efficiency, Low I , Step-Up DC-DC Converters

... converters (high efficiency with heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads. The MAX761/MAX762 input voltage range is 2V to 16.5V. Output voltages are preset to 12V (MAX761) and 15V (MAX76 ...
HKUST Institutional Repository - Hong Kong University of Science
HKUST Institutional Repository - Hong Kong University of Science

... bound of the maximum supply of typical IC technologies. ...
LM131A/LM131, LM231A/LM231, LM331A/LM331 Precision
LM131A/LM131, LM231A/LM231, LM331A/LM331 Precision

... switch and the output driver transistor. When the voltage at pin 5 rises to )/3 VCC, the timer comparator causes the RS flip-flop to reset. The reset transistor is then turned ON and the current switch is turned OFF. However, if the input comparator still detects pin 7 higher than pin 6 when pin 5 c ...
A simple three-terminal IC bandgap reference
A simple three-terminal IC bandgap reference

... basis for this compensation is illustrated by Fig. 5. When the two-transistor bandgap cell is operated into a current mirror an output current is produced whenever the common-base voltage departs from the nominal voltage determined by the current density ratio and by RI and R2. The change in this cu ...
5 V low drop voltage regulator
5 V low drop voltage regulator

... is regulated up to input supply voltage of 40 V. The high-precision of the output voltage (2%) is obtained with a pre-trimmed reference voltage. The voltage regulator automatically adapts its own quiescent current to the output current level. In light load conditions the quiescent current goes down ...
LectNotes1-CircuitBasics
LectNotes1-CircuitBasics

... passive sign convention is not called the active sign convention. (Of course, people use the term active sign convention, but they are not supposed to. If you want to be an alpha geek, find out why and go around correcting them!) Instead, the awkward term "Not passive sign convention" is used. Actua ...
ADR1581 数据手册DataSheet 下载
ADR1581 数据手册DataSheet 下载

... base emitter voltage in the forward-biased operating region. All such transistors have an approximately −2 mV/°C temperature coefficient, which is unsuitable for use directly as a low TC reference; however, extrapolation of the temperature characteristic of any one of these devices to absolute zero ...
Floating-Gate Systems
Floating-Gate Systems

... The injected electrons are generated by hole impact ionizations. **Injection current is proportional to source current, and is an exponential function of Fdc. ...
Electrical Components and Circuits
Electrical Components and Circuits

PWM signal
PWM signal

... Shifts Input Voltage: 0.55 – 2.75V To Output Voltage: 0 – 3.3V - 5kΩ resistor used to imitate the 5kΩ throttle pedal variable resistor for correct current draw from stock golf cart controller. Prevents stock controller from thinking it has lost connection with throttle pedal. - Single relay selects ...
Depletion-Mode Power MOSFETs and Applications
Depletion-Mode Power MOSFETs and Applications

... The on-state drain current, ID(on), a parameter defined in the datasheet, is the current that flows between the drain and the source at a particular drain-to-source voltage (VDS), when the gate-to-source voltage (VGS) is zero (or short-circuited). By applying positive gate-to-source (VGS) voltage, ...
Rev. B
Rev. B

Single Current Loop E Single Current Loop II
Single Current Loop E Single Current Loop II

... Single Current Loop II A current loop is a circuit with any number of elements in it that are connected so that current can flow around the loop. We compute such a loop by looking at the voltages across the devices, the sum of all these voltages has to add up to zero. Circuit Rules: Loop Rule: The s ...
A 225°C Rated ASIC for Quartz Based Downhole
A 225°C Rated ASIC for Quartz Based Downhole

... ASICs.[3,4,12] Custom ICs designed using High Temperature rated SOI processes have been shown to function above 300°C.[5] These processes have very high threshold voltages which severely limits the ability to design 2.5V amplifier circuits. ...
Six-Output 600V MGDs Simplify 3
Six-Output 600V MGDs Simplify 3

< 1 ... 680 681 682 683 684 685 686 687 688 ... 984 >

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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