Active-mode npn transistors in circuits, Electrical Engineering

Assignment Help:

Active-mode NPN transistors in circuits

940_Active-mode NPN transistors in circuits.png

Figure:  Structure and use of NPN transistor. Arrow according to schematic.

The figure opposite is a schematic presentation of an NPN transistor associated to two voltage sources. To construct the transistor conduct appreciable current (on the order of 1 mA) from C to E, VBE have to be above a minimum value sometimes considered to as the cut-in voltage. The cut-in voltage is generally about 600 mV for silicon BJTs at room temperature but can be different depending upon the sort of transistor and its biasing. This applied voltage results in the lower P-N junction to 'turn-on' permitting a flow of electrons from the emitter into the base. In active mode, the electric field lay between base and collector (caused by VCE) will cause the majority of these electrons to cross the upper P-N junction into the collector to make the collector current IC. The remainder of the electrons again combines with holes, the majority carriers in the base, making a current by the base connection to form the base current, IB. As displayed in the figure, the emitter current, IE, is the total transistor current that is the sum of the other terminal currents (that is IE=IB+IC).


Related Discussions:- Active-mode npn transistors in circuits

Compute the theoretical and practical frequency, Q. An RG-139/U rectangular...

Q. An RG-139/U rectangular waveguide is given to have dimensions a = 0.8636 mm and b = 0.4318 mm. Compute the theoretical and practical frequency ranges of operation for the guide.

Abrasive jet machining system, Describe the effect of following parameters ...

Describe the effect of following parameters on working rate and accuracy of material removal in AJM. (i) Grain size (ii) Stand off distance (iii) Jet velocity. Draw sch

Basic requirement of semiconductor laser, What is basic requirement of semi...

What is basic requirement of semiconductor laser? Draw its label diagram and explain its working with necessary theory. Write down the applications of semiconductor laser.

How do you find the insulation resistance of transformer, Q. How do you cal...

Q. How do you calculate the insulation resistance of transformer and what is the minimum value? Ans. The insulation resistance of the transformer will be calculated by using

Voltage transfer function of the high-pass filter, Determine the voltage tr...

Determine the voltage transfer function of the high-pass filter circuit shown in Figure, and find the expression for ω 0 .

Induced emf, what is the difference between statically and dynamically indu...

what is the difference between statically and dynamically induced emf?

Robotic, Ask questCompute the mean and variance of a four-level image with ...

Ask questCompute the mean and variance of a four-level image with histogram p(z\ ) = 0.1, p{zi) = 0.4, ?(1?) =0.3, p{za) = 0.2. Assume that z\ = 0, zi = 1, z$ = 2, and ? — ?. i

RF design, Could you please answer this question with an explanation?

Could you please answer this question with an explanation?

Standard color-coded bands for evaluating resistance, Standard Color-Coded ...

Standard Color-Coded Bands for Evaluating Resistance Practical resistors are manufactured in standard values, various resistance tolerances, several power ratings (as will be e

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd