Illustrate in brief the term EDFA
Illustrate in brief the term EDFA?
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EDFA stands for Erbium Doped Fiber Amplifier. It is a device which boosts the signal in an optical fiber. EDFA is the optical repeater device which is used to increase the intensity of the optical signals being carried via a fiber optic communications system. The optical fiber is doped with the rare earth element erbium in such a way that the glass fiber can absorb light at one frequency and emit light at other frequency. The external semiconductor laser couples light to the fiber at infrared wavelengths of either 980 or 1480 nanometers. This action stimulates the erbium atoms.
State some of the differences between high speed TTL and low power TTL?
A piece of homogenous semiconductor material that is n-type of length 100µm as well as uniform cross-sectional area of 5x10-4 cm2 having a doping concentration of 1017cm-3. There a linear gradient of carrier concentrat
1.Describe how you might recover heat from (a) a process exhaust gas stream (e.g. from an oven) (b) a process warm water stream (e.g. from a commercial dishwasher). Discuss any aspects of the streams that may influence your choice of heat recovery system. 2
1.Describe how you might recover heat from
(a) a process exhaust gas stream (e.g. from an oven)
(b) a process warm water stream (e.g. from a commercial dishwasher).
Discuss any aspects of the streams that may influence your choice of heat recovery
system.
2
Explain the characteristics of the 8051 micro controllers?
Illustrates the differences between synchronous and iso-synchronous communication?
We will be using a bipolar stepper motor to control the motion of the cart. 1. How do you interface a microcontroller to a motor? Can you just connect the pins? 2. What are H-br
We will be using a bipolar stepper motor to control the motion of the cart.
1. How do you interface a microcontroller to a motor? Can you just connect the pins?
2. What are H-br
Describe the parallel port devices.
Write regarding the CALL statement within the 8051?
A step-down transformer that operating from a 50Hz mains supply of 220 Volt rms, is used to give a decrease voltage to a secondary power supply. The final delivers 400 Watt of power to a load consisting of an equivalent resistance of 10?. The transformer should have a
Explain why NAND gate is preferred over the NOR gate for fabrication?
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