A phase modulated wave can be generated from frequency modulator by connecting a ___________ before the modulator and a frequency modulated wave can be generated from phase modulator by connecting a __________ before the modulator.

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HPCL Engineer Instrumentation 11 Aug 2021 Official Paper
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  1. Differentiator, integrator
  2. differentiator, high-pass filter
  3. integrator, low-pass filter
  4. integrator, differentiator

Answer (Detailed Solution Below)

Option 1 : Differentiator, integrator
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FM मॉड्यूलेटर का आउटपुट निम्न रूप का होता है

अवकलक के माध्यम से मॉड्यूलेटिंग सिग्नल पारित करने के बाद हम आवृत्ति मॉड्यूलेटर के इनपुट के रूप में  देते हैं

आउटपुट सिग्नल की अभिव्यक्ति होगी:

समाकल का अवकलन केवल मूल सिग्नल देगा।

हमें एक फेज मॉडुलित सिग्नल मिलता है जो इस रूप का होता है:

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