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Q. Define wireless communications?
The latest wireless communications technology is the personal satellite phone. The coverage is planetary and one can reach anywhere on earth. Examples include the Iridium satellite handset developed byMotorola and others fromthe Teledesic constellation. Special requirements, such as sending and receiving data or faxes, can be handled by the new handheld computer-and-mobile- phone hybrids such as Nokia's 9000i and the Ericsson DI27. Mobile phones with aWeb browser capability are also available. We have yet to see the more exciting new developments in the telecommunications industry with computers, networking, and wireless technology.
Optimal Filtering A system identi?cation structure is shown in Figure 1. The discrete-time signal [ ] forms the input to an unknown system represented by a moving average
Q. How does a MOSFET amplify electrical signals? While a minimum requirement for amplification of electrical signals is power gain, one finds that a device with both voltage an
Q. Given ¯B = (y ¯ax - x ¯ay )/(x 2 + y 2 ) T, determine the magnetic force on the current element Id ¯l = 5 × 0.001¯a A located at (3,4,2).
A small signal amplifier circuit is given in figure Q 4. The values of RD and RS must be set such that the gain of the system is 8. It is also known that Vgs = ¼ Vp. a). Per
Which clipper would you prefer between the series and the shunt clipper? Why?
what is that mean and explain
Q. An n-channel JFET is given to have V P = 3V and I DSS = 6 mA. (a) Find the smallest value of v DS when v GS =-2 V if the operation is to be in the active region. (b) D
Temperature Triggering At high temperature the leakage current of junction J 2 increases. This leakage current is collector current of tr 1 and Tr 2 . So rise in temperat
What do you understand by solid modeling and wireframe modeling in CAD systems? Explain and compare the both modellings. Describe the following 1. Boundary representation 2.
Trivector Meter A trivector meter is designed to record active, reactive and apparent energy along with MD indicators on all. The trivector meter is a compact unit. It exchan
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