Pnp bipolar junction transistor, Electrical Engineering

Assignment Help:

PNP

The other kind of BJT is the PNP with the letters "P" and "N" standing for the majority charge carriers inside the dissimilar regions of the transistor.

1519_PNP Bipolar Junction Transistor.png

Figure: The symbol of a PNP Bipolar Junction Transistor.

PNP transistors contain a layer of N-doped semiconductor among the two layers of P-doped material. A small current that is leaving the base in common-emitter mode is amplified in the collector output. In other words, a PNP transistor is "on" while its base is pulled low relative to the emitter.

The arrow (shown in figure) in the PNP transistor symbol is on the emitter leg and points in the direction of the conventional current flow while the device is in forward active mode.

One mnemonic device for making out the symbol for the PNP transistor is "pointing in proudly / 'pointing in - pah'."


Related Discussions:- Pnp bipolar junction transistor

Carry flag - sub subtract instruction , Carry Flag CY is  reset  as e...

Carry Flag CY is  reset  as explained  above.  ( in chapter 1 we have  sen in the 2 complement  methods of subtraction that  the carry  is set  when the result is positive. He

Express the storedmagnetic energy, A relay is essentially an electromechani...

A relay is essentially an electromechanical switch that opens and closes electrical contacts. A simplified relay is represented in Figure. It is required to keep the fenomagnetic p

Effect of feedback on dynamic response and bandwidth, Q. Effect of feedback...

Q. Effect of feedback on dynamic response and bandwidth? Let us consider the block-diagram representation of the open-loop system shown in Figure 16.2.5(a), whose direct transf

Microprocessor system, A burglar alarm system is controlled by a microproce...

A burglar alarm system is controlled by a microprocessor system. The system has three independent circuit each consisting of 7 passive infra red sensors. The controller can be prog

Audio Amplifier, Hi, i''ve been given this task: You are required to desig...

Hi, i''ve been given this task: You are required to design a multi-stage audio amplifier with the following specification: Voltage gain 250 Input resistance 200 kOhm Output resi

Electricity and safety, explain appropriate first aid procedure to be follo...

explain appropriate first aid procedure to be followed in case of electric shock

Find the average power absorbed by each element, Q. Let v(t) = Vmax cos ωt ...

Q. Let v(t) = Vmax cos ωt be applied to (a) a pure resistor, (b) a pure capacitor (with zero initial capacitor voltage, and (c) a pure inductor (with zero initial inductor current)

Which property of material allows it to drawn out in wires, Property of mat...

Property of material which allows it to be drawn out into wires is (A) Ductility.                                    (B) Solder ability. (C) Super conductivity.

Pn junction, the depletion layer in the pn junction is caused by

the depletion layer in the pn junction is caused by

Relationship between the induced e.m.f and the network, Mathematical relati...

Mathematical relationship between the induced e.m.f and the network Faraday noted that the e.m.f induced in a loop is proportional to the rate of change of magnetic flux by it:

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