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

Explain the effect of feedback on amplifier bandwidth, Q. Explain the effec...

Q. Explain the effect of feedback on amplifier bandwidth? The bandwidth of an amplifier is defined as the range of frequencies for which the gain remains constant.The gain -ban

Resistors, what are the classifications of fixed resistor?explain

what are the classifications of fixed resistor?explain

Dc chopper - power supplies , DC chopper This is  one stage  conversio...

DC chopper This is  one stage  conversion  device  which is used for direct conversion of fixed  de voltage at a level to an adjustable dc voltage  at another  level.

Matlab magnetic field, i have an assignment related to magnetic field i ha...

i have an assignment related to magnetic field i have attached the( MRI assignment sheet)[1] please read it carefully in the assignment 2 methods to get the results - one by

Network theorems.., how to calculate voltage when 3 voltage sources are giv...

how to calculate voltage when 3 voltage sources are given?

Show how a 16-to-1 multiplexer implement the logic function, Q. Show how a ...

Q. Show how a 16-to-1 multiplexer can be used to implement the logic function described by the following truth table.

Energy stored in the coil, The term representing the energy stored in the c...

The term representing the energy stored in the coil may be written in terms of the inductance of the coil as... The energy stored in the coil increases with the square of t

8085microprocessor architecture , Normal 0 false false fals...

Normal 0 false false false EN-IN X-NONE X-NONE 8085MICROPROCESSOR ARCHITECTURE

Logistical management - gis applications, Logistical management - Gis appli...

Logistical management - Gis applications: Using GIS also allows a radical improvement in daily work management practices - such as planning new installations, scheduling opera

Find the equation of the circle concentric, 1. Find the slope and the y-int...

1. Find the slope and the y-intercept of the line whose equation is 5x + 6y = 7. 2. Find the equation of the line that is parallel to 2x + 5y = 7 and passes through the midpoint

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