ECG1475, CB Radio PLL Frequency Synthesizer IC ~ 20 Pin DIP (NTE1475) – MarVac Electronics
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Digital PLL Frequency Synthesizers: what they are, how they work - YouTube
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Digital PLL Frequency Synthesizer » Electronics Notes
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Digital PLL Frequency Synthesizers: what they are, how they work - YouTube
Frequency Synthesizers | How it works, Application & Advantages