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Q. What is thermal runaway.
The problem of self heating arises due to dissipation of power at the collector junction. The leakage current ICBO is extremely temperature dependent and increase with the rise of temperature of collector base junction. An increase in ICBO causes an increase in collector current IC considerabely. With the increase in collector current ,collector power dissipation increase which raises the junction temperature which leads to further increase in collector current. The process is cumulative and may lead to the eventual destruction of the transistor . This phenomenon is called thermal runaway.
Find the core radius necessary for a single mode operation at 1320nm of a step index fibre with n 1 =1.48 and n 2 =1.478. What are the N.A and maximum acceptance angle for this fib
1. Describe the magnetic effects of current? ( to achieve a pass grade, describe the magnetic effect of current) 2. Complete the diagram to show the direction of mo
what is ebers moll model
(a) Show the equivalent NOR realizations of the basic NOT, OR, and AND gates. (b) Show the equivalent NAND realization of the basic NOT, AND, and OR gates.
Q. Determine voltage and current gains for the CE BJT amplifier shown in Figure with the following parameters: R 1 = 30,000, R 2 = 9000 ,R C = 750 ,R E = 250 , R L = 1000
different types of probe
Q. What is a Modem? Modems are generally used to interface digital circuits to transmit information on analogue channels such as telephone systems. Modem (from modulator-demodu
Explain Diffusion. Diffusion : Though, the mobility of the carriers in a semiconductor is greater than the electrons in metals, the conductivity in the former is much less t
Q. Explain Internal Data Bus? Internal Data Bus: A bus which operates only within internal circuitry of the CPU, communicating among internal caches of memory which are part of
Q. Explain Block diagram of the system? The block diagram is a pictorial representation of the equations of the system. Each block represents a mathematical operation, and the
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