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Describe working of frequency synthesizer used in mobile handset. OR Draw block diagram of frequency synthesizer unit of mobile handset and state its function in cellular handset.
written 5.4 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 2.4 years ago

OR

Draw neat block diagram of frequency synthesizer and label the blocks. Explain its working.
mobile communication
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written 5.3 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 5.3 years ago

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1) The synthesizer is used for developing all the signals used by the transmitter and Receiver.

2) It uses PLL circuits and mixer.

3) The crystal oscillator provides a reference for two PLL.

4) The function of PLL is to lock or synchronize frequency of VCO to that of input …

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