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Voltage Controlled Oscillator
The MC1648 requires an external parallel tank circuit consisting of the inductor L and capacitor C . For Maximum Performance QL ≥ 100 at Frequency of Operation.
A varactor diode may be incorporated into the tank circuit to provide a voltage variable input for the oscillator VCO . The MC1648 was designed for use in the Motorola Phase– Locked Loop shown in Figure 9.
This device may also be used in many other applications requiring a fixed or variable frequency clock source of high spectral purity.
The MC1648 may be operated from a 5.0 V dc supply or a – 5.2Vdc supply, depending upon system requirements. |
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