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Chapter 5- Ohm`s Law
Chapter 5- Ohm`s Law

... • Kirchhoff’s Law – In 1847 G. R. Kirchhoff extended Ohm’s law with two important statements. – Kirchhoff’s current law: • The algebraic sum of all the currents (I) entering and leaving a junction is equal to zero. • IT = I1 + I2 + I3 ...
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... adjustment where provided are under the bungs on the front panel. Resetting these will degrade the accuracy of this transducer, but may be used to compensate for system errors etc. typically 10% of the span of the control concerned. ...
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Regatron Power Supplies 32 kW / 600 VDC / 66 A - Schulz

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... cross section area of 1 mm2. The unit system has been changed slightly since that time, such that the column of mercury would only be 0.96 ohms. ...
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Lecture 09 - Electric Circuits
Lecture 09 - Electric Circuits

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Buffer Amplifiers - Georgia Institute of Technology

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مواصفات_العطاء
مواصفات_العطاء

... Auto cut off output no transferring to bypass Zero-cross transfer, <4ms. UPS to bypass or reverse 10 minutes Less than 4 hours to 90% Ethernet (& Optional RS232 ) with support for SNMP V1, V2 Licensed management and monitoring software (using Ethernet and RS-232) System operating status display, inp ...
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... voltage in the forward-biased operating region. All such transistors have approximately a –2 mV/°C temperature coefficient, unsuitable for use directly as a low TC reference; however, extrapolation of the temperature characteristic of any one of these devices to absolute zero (with emitter current p ...
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UDN2998 - Allegro MicroSystems

... operate inductive loads up to 50 V with continuous output currents of up to 2 A per bridge or peak (start-up) currents to 3 A. The control inputs are compatible with TTL, DTL, and 5 V CMOS logic. Except for a common supply voltage and thermal shutdown, the two drivers in each package are completely ...
Emitter-coupled Logic
Emitter-coupled Logic

... By properly selecting R and VREF , the output high and low voltage levels could be made compatible with the input levels. For example, we could select VREF = −0.3, VH = 0V and VL = −0.6V . Then setting IEE = 0.3mA and R = 2kΩ would produce the same voltage levels at the output. It is, however, difficu ...
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... 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the ...
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... temperature compensation. However, you will often encounter a custom-designed regulator made with discrete components. This could be in an older piece of equipment, or merely due to the fact that a non-standard voltage, high current or unusual design specification is required. For the purposes of th ...
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... 1. The resistance of a filament lamp increases as the filament gets hotter 2. A diode allows current to flow in one direction only (the diode has a very high resistance in the opposite direction) 3. The resistance of a light dependent resistor decreases with increasing ...
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BASIC CONCEPTS
BASIC CONCEPTS

< 1 ... 901 902 903 904 905 906 907 908 909 ... 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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