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Q. What are the different types of distributing frames used in exchanges?
Ans:
Different distribution frames used in exchange are displayed in figure. Each subscriber in a telephone network is connected generally to the nearest switching office by a dedicated pair of wires. Subscriber loop denotes to this pair of wires. It would be unwisely to run physically independent pairs from each subscriber premises to exchange. It is far easier to lay cables comprising a number of pairs of wires for different geographical locations and run individual pairs as needed by subscriber premises.
Q. Give applications of emitter follower The emitter follower has the following principal applications: 1. To provide current amplification with no voltage gain 2. Impede
how many data input and data output line for 8k 16-bits?
objective ?
Discuss any one application of 8254 Programmable Interval Timer in detail. Mode1 causes the counter to treat as a retriggerable monostable multivibrator one shot. The G inpu
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Write some disadvantages of loosely coupled systems More complicated due to the needed additional communication hardware. They are less portable and more expensive because o
An 12µF capacitor is connected in series to a 0.5M? resistor across the dc voltage supply of 240V. verify: (a) Time constant (b) Initial charging current (c) Time fo
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Q. What is a clamper? Differentiate between a clamper and clipper. Clamping network shifts (clamps) a signal to a different dc level, i.e. it introduces a dc level to an ac sig
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