Digital Delay Loop using the modified VCDL

Description

SPICE simulation of the Digital Delay Loop (DDL) that uses the modified version of Voltage-Controlled Delay Line (VCDL). The VCDL gain must be as linear as possible, otherwise the DLL can exhibit second-order locking effects. To reduce the jitter and to linearize the loop’s response, a large capacitor (5pF) is used for the loop filter.

• Project Type: Free
• Complexity: Advanced
• Components number: 51-100
• SPICE software: LTspice
• Software version: IV
• Full software version nedeed : No
• Screenshots simulation images: