90% उपयोगिता अनुपात वाली 1 MHz स्पंद ट्रेन का चालू-समय कितना होगा?

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SDSC ISRO Technical Assistant Electronics 8 April 2018 Official Paper
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  1. 900 ns
  2. 100 ns
  3. 50 μs
  4. 0.5 μs

Answer (Detailed Solution Below)

Option 1 : 900 ns
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संकल्पना:

उपयोगिता अनुपात को गणितीय रूप से परिभाषित किया गया है::

\(Duty\;cycle = \frac{{{T_{on}}}}{{{T_{on}} + {T_{off}}}}=\frac{T_{on}}T{}\) ------(1)

जहाँ,

T: कुल समय (चालू समय + बंद समय) जिसे निम्न प्रकार से परिभाषित किया गया है:

\(T=\frac{1}{f}\) ------(2)

f: स्पंद आवृत्ति

गणना:

दिया गया है:

f = 1Mhz

उपयोगिता अनुपात = 90%

समीकरण 1 और 2 से,

उपयोगिता अनुपात = TOn x f

0.90 = Ton x 1Mhz

Ton = 900 nsec

अतः विकल्प 1 सही है।

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