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Practical Electronics/IC/4046
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4046 Analogue Digital Mixed PLL IC VCO, 2 Phase Comparators and Zener diode 16
The 4046 contains one Voltage Controled Voltage that require external capacitor and two resistors, two differents phase comparators and a zener diode of 5.2V. Is used like a low frequency synthesizer, frequently used with 4020, 4022, 4024 and others frequency dividers.
Used in applications like FM and FSK demodulators, VCOs, etc.