Explain pnp transistor circuit, Electrical Engineering

Assignment Help:

Explain pnp transistor circuit.

pnp transistor: A transistor consist of  three terminals. In this pnp transistor there is two blocks of p- type semiconductors that are separated by a thin layer of n-type semiconductor. This pnp transistor circuit is demonstrated in the figure below. The emitter base junction is forward biased whereas the collector base junction is reversing biased. There forward biased voltage is VEB is quite small, while the reverse biased voltage VCB is much high. Since the emitter base junction is forward biased a large number of holes (that is majority carriers) in the emitter (i.e. p- type) are pushed towards the base. It constitutes the emitter current IE. While these holes enter p- type material (base), they are subject to combine with electrons. Because the base is lightly doped and very thin, simply some electrons (less than 5 percent) combine with electrons to constitute base current that is IB. The remaining holes (more than 95 percent) diffuse across thin base region and reach collector space charge layer. All holes then come under the affect of the negatively biased p- region and are attracted or collected through the collector. It constitutes collector current that is IC. It is seen that almost all emitter current flows in the collector circuit. Therefore, the emitter current is the sum of collector current and base current that is IE = IC+ IB.

589_pnp transistor circuit.png

pnp transistor circuit


Related Discussions:- Explain pnp transistor circuit

Mixed mode simulator, Mixed Mode Simulator: The circuit is preproc...

Mixed Mode Simulator: The circuit is preprocessed. The test points and waveform markers are located in input and output of the circuit. GND net is set like reference net.

Compute the firing angle for the rated braking torque, Consider a 3-hp, 220...

Consider a 3-hp, 220-V, 1800-r/min separately excited dcmotor controlled by a single-phase fully controlled rectifierwith an ac source voltage of 230Vat 60Hz.Assume that the full-l

Static v- i characteristics - power semiconductor devices , Static V- I Cha...

Static V- I Characteristics A thyristor  works in  three basic  modes a.Reverse  blocking mode b.Forwards  blocking  mode and c.Forward  conducting  mode In revers

Managing a Professional Engineering Project, Design a solar powered electri...

Design a solar powered electric vehicle charging station in a liquid gas station

Determine the capacitor voltage, Q. In an RLC series circuit excited by a v...

Q. In an RLC series circuit excited by a voltage source v(t), for R = 10 , L = 1 H, and C = 0.1F, determine v(t) if the capacitor voltage vC(t) = 5e -10t V.

Electromechanical meters, Electromechanical Meters Electromechanical e...

Electromechanical Meters Electromechanical energy meters are based on the Ferraris Principle (see note in the margin). The working of these meters is explained. Working o

Calculate the frequencies at which there is an alias, A pure sine wave alon...

A pure sine wave along with a frequency of 100Hz is sampled at 150Hz. At which point one of the subsequent frequencies would you expect an alias? A) 75Hz B) 100Hz C) 150Hz

truth table in sop form, Normal 0 false false false EN...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Write a short note dispersion shifted dispersion flat fiber, Write a short ...

Write a short note on dispersion shifted and dispersion flatted fibers? The dispersion features of a fiber is display below: The overall dispersion is the sum of materi

Show basic construction of mosfet, Q. Show Basic Construction of MOSFET? ...

Q. Show Basic Construction of MOSFET? The basic construction of the n-channel depletion-type MOSFET is provided in Figure. A slab of p-type material is formed from a silicon

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