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Design and Applications of Delay Locked Loop

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It consists <strong>of</strong>:<br />

inverter stage<br />

variable capacitive load<br />

840<br />

800<br />

Inverter with variable capacitive output<br />

impedance (transistor M 4 & M 8 )<br />

Bias circuit is not necessary.<br />

Control voltage V ctrl polarize gates<br />

transistors M 3 & M 7 which work in linear<br />

mode (like resistors) <strong>and</strong> determine<br />

output impedance.<br />

kašnjenje td [ps]<br />

760<br />

720<br />

680<br />

640<br />

600<br />

560<br />

3 3.5 4 4.5 5<br />

napon V ctrl [V]

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