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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

VCXO
Abbreviation for Voltage Controlled crystal Oscillator. A VCXO is a type of oscillator used in many modern digital devices as a master clock source. Essentially it is a stable clock source (as you would expect from a crystal), but with an ability to have its rate "pulled" up or down by changes of input voltage. VCXO's provide manufacturers with a way to have a stable clock in their devices while still allowing them to be synchronized to an external clock source like word clock. This is often accomplished by using a PLL or Phase Locked Loop to compare the external clock to the output of the VCXO, which will generate a control voltage based on the difference. This voltage is used to vary the frequency of the crystal, thereby keeping it in sync with the external clock.

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