Pnp bipolar junction transistor, Electrical Engineering

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'."

Posted Date: 1/10/2013 6:43:01 AM | Location : United States







Related Discussions:- Pnp bipolar junction transistor, Assignment Help, Ask Question on Pnp bipolar junction transistor, Get Answer, Expert's Help, Pnp bipolar junction transistor Discussions

Write discussion on Pnp bipolar junction transistor
Your posts are moderated
Related Questions
how to break a signal into time components

Q. A noninverting op-amp circuit and its closed-loop representation are given in Figure. Obtain an expression for the closed-loop transfer function H(ω) = Y (ω)/X(ω) and comment on

Q. Derive the equations of the self bias circuit? A circuit which is used to establish a stable operating point is the self biasing configuration. The circuit is shown in Fig

Q. A rotating electric machine with uniform air gap has a cylindrical rotor winding with inductance L 2 =1 H and a stator winding with inductance L 1 =3H. Themutual inductance va

Q. Examine the features of a typical PC motherboard? The purpose of this experiment is to examine the features of a typical PC motherboard, including: CPU and co-process

Q. What is their relation with gain? What are the factors affecting frequency response of an amplifier? Some amplifiers should be "flat" across a band of frequencies. In other

Q. A wye-connected, three-phase, 50-Hz, six-pole synchronous alternator develops a voltage of 1000 V rms between the lines when the rotor dc field current is 3A. If this alternator

We shall demonstrate load-line analysis to find the diode current and voltage, and then compute the total power output of the battery source in the circuit of Figure (a), given the

Q. A single-phase industrial plant consists of two loads in parallel: P1 = 48kW PF1 = 0.60 lagging P2 = 24kW PF2 = 0.96 leading It is operated from a 500-V, 60-Hz source.

What are ultrasonic sensors made of? What is a good online source to find information on a basic level about ultrasonic sensors?