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6517B Electrometer/High Resistance Meter
6517B Electrometer/High Resistance Meter

Experiment 1: Measurement and Calculations of Basic Electrical
Experiment 1: Measurement and Calculations of Basic Electrical

ST3243EB
ST3243EB

... discharge and ± 15 kV using the human body model. The receiver R2 is always active to implement a wake-up feature for serial port. The ST3243E has a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0 V to 5.5 V supply with a dual charge pump. The device is g ...
Test 2 Fall, 2012 Solve any 10 problems: In the above figure, the
Test 2 Fall, 2012 Solve any 10 problems: In the above figure, the

... 7. In the above figure, a wire forms a closed circular loop, with radius R=2cm and resistance 4 Ω. The circle is centered on a long straight wire ; at time t=0, the current in the long straight wire is 5 A rightward. Thereafter, the current changes according to i= 5A-(2 A/s2) t2. (The straight wire ...
HFE408x-321 Specification
HFE408x-321 Specification

MAX1636CPUEVKIT
MAX1636CPUEVKIT

... The MAX1636 CPU supply evaluation kit (EV kit) circuit is intended for converting high-voltage battery power into a low-voltage supply rail for next-generation notebook CPU cores. The output is digitally adjustable between 1.25V and 2V, in 50mV increments. The input range is +7V to +22V. It delivers ...
FEATURES
FEATURES

... reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The LR9198 ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

Lecture 17: BJT Biasing. Current Mirror.
Lecture 17: BJT Biasing. Current Mirror.

... then we’ll have a biasing circuit design that is largely insensitive to variations in temperature. So physically how do these conditions (4) and (5) make a good biasing circuit?  Eqn. (4) makes the base voltage largely independent of  and determined almost solely by R1 and R2. How? Because the cur ...
GP/IP - Uplift Meridian
GP/IP - Uplift Meridian

AD8044
AD8044

... One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. ...
MECH373-Final-2010-F-QES
MECH373-Final-2010-F-QES

... The maximum input voltage to the data acquisition system is 8 V and its input impedance is 1 M (Ro). The output impedance of the power line circuit is 0.5  (Rs). A. Determine the value for resistor R2 in Figure below if R1 has a value of 100 k (neglect loading effects resulting from Rs and Ro). B ...
EE 448
EE 448

... Use the voltages from Part 3 to calculate the voltage ratio and compare with the winding ratio. How do the ratios in Part 3 compare to the ratios from Part 1? Fill in Table 4 with the following calculations: Calculate percent regulation. (Hint: Vnoload comes from Part 1 of the ...
Difet OPA121 Low Cost Precision OPERATIONAL AMPLIFIER
Difet OPA121 Low Cost Precision OPERATIONAL AMPLIFIER

... reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not ...
Solution Tutorial 1
Solution Tutorial 1

... The diode assumed to have a voltage across it when forward-biased (right-shift), since barrier potential and r’d are included. This voltage, VF, consists of the barrier potential voltage plus the small voltage drop across the dynamic resistance. Curve slopes because the voltage drop due to dynamic r ...
ADN4665 数据手册DataSheet 下载
ADN4665 数据手册DataSheet 下载

... DOUTx+ sinks current and DOUTx− sources current; a negative differential voltage across RT results in a Logic 0 at the receiver output. ...
AP65402 - Diodes Incorporated
AP65402 - Diodes Incorporated

... amplifier (EA) output voltage is higher than the current sense amplifier output, and the current comparator’s output is low. The rising edge of the 500kHz oscillator clock signal sets the RS Flip-Flop. Its output turns on HS MOSFET. The current sense amplifier is reset for every switching cycle. Whe ...
Introduction to the Multimeter
Introduction to the Multimeter

...  Either select a scale appropriate for your measurement or choose AUTO and let the multimeter select the appropriate scale for you.  Measuring the voltage from across the 1K resistor (~3V), you wouldn’t want to choose 200mV (much too small) or 200V (much too large). Instead, the 2V selection is mo ...
U3e L2 Electrical Technology 2
U3e L2 Electrical Technology 2

... 4. A cell phone charger converts the wall outlet voltage to 5 Volts to charge the cell phone. The amount of current that the charger outputs is .7 Amperes. Sketch a schematic diagram of this circuit. What is the power used by the cell phone in recharging its battery? ...
Analysis of Collected Data on Electrical Components
Analysis of Collected Data on Electrical Components

... voltage output at TP 2 to the position of the buoy. The TP 2 output is simply the voltage result of comparing the currents of the upper and lower halves of the photodiode quadrant, and is eventually fed into the Gain, Coarse / Fine, and Direct / Invert controls before powering the solenoids. The dat ...
Improved Valley-Fill Passive Current Shaper
Improved Valley-Fill Passive Current Shaper

AN2840
AN2840

... The VIPER17HN has several built-in features, such as a frequency jittering to reduce EMI problems, soft-start, and burst-mode operation for low power consumption during light load and no-load conditions. Over-current, overload and over-temperature protections are also implemented internally and guar ...
RC circuit
RC circuit

Parallel and Serial Circuits
Parallel and Serial Circuits

... • Conversion of units can be done with teams and groups on flipcharts and on the board in class summary and recaps. • During jigsaw group activity system experts can collaboratively teach the denser concepts. • Create diagrams of individual components to illustrate the physics and flow of electronic ...
iC-DL Datasheet - iC-Haus
iC-DL Datasheet - iC-Haus

< 1 ... 617 618 619 620 621 622 623 624 625 ... 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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