Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Turn-on, turn-off, and storage delay:
The Bipolar transistor shows a few delay characteristics while turning on and off. Most of the transistors, and particularly power transistors, show long base storage time that limits maximum frequency of operation in switching applications. One technique for reducing this storage time is using a Baker clamp.
Transistor 'alpha' and 'beta':
The proportion of electrons capable to cross the base and reach the collector is a measure of the BJT (bipolar junction transistor) efficiency. The heavy doping of the emitter region and light doping of the base region origin several electrons to be injected from the emitter into the base than as compared to the holes to be injected from the base into the emitter. The common-emitter current gain is presented by βF or hfe; it is approximately the ratio of the DC collector current to the DC (direct current) base current in forward-active region. It is generally greater than 100 for small-signal transistors but can be smaller in transistors intended for high-power applications. An additional significant parameter is the common-base current gain, αF. The common-base current gain is almost the gain of current from emitter to collector in the forward-active region. This ratio generally has a value that is close to unity; approximately between the 0.98 and 0.998. Alpha and beta are more precisely related through the following identities (NPN transistor):
αF = Ic/IE
βF = Ic/IB
βF = αF / (1- αF) ↔ αF = βF / (βF +1)
a) A 230 V/25V, 50 HZ transformer with a rated primary current of 1,2 Amps is used to supply a number of 25 V, 30 Watt halogen light bulbs. Assuming an ideal transformer and tha
field effect transistor as switch?
All semiconductors in their last orbit have (A) 8 electrons. (B) 2 electrons. (C) 4 electrons. (D) 6 electrons. Ans: All semiconductors in their
The assignment is to plan, design and write a PLC program on the FX Training Software using a PART SUPPLY CONTROL SYSTEM based on the requirement specification outlined be
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
Analysis of Frequency Response with PSpice and PROBE PSpice can readily accomplish the circuit analysis as a function of frequency, and PROBE can display Bode plots for magnitu
why is a delay line used in the vertical selection of oscilloscope?
Discuss need of Pipelining. The simplest method for improving performance by hardware parallelism is pipelining. Pipelining has breaking up the operations to be performed in s
Simplify using k-map f(A,B,C,D)=?M(4,6,10,12,13,15) Using behavioral modeling in xilinx VHDL
What are the different kinds of surface entities used in CAD? Give homogeneous Matrix form equation for : (i) B-Splive Curve (ii) Bezier Curve
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd