Phase-locked loops (PLLs) are most common in applications like wireless transceivers, cellular phones, global positioning systems, etc. An important characteristic of a PLL is its lock time. Lock time is the time a PLL takes to adapt and settle down to changes in the input frequency. Conventional PLLs employ the technique of phase tracking which takes a long time to lock, so they are misfits for contemporary high-speed high-throughput technology. Fast locking is required for fast-frequency hopping among data bursts in high-speed digital communications PLLs with low-power constraints demand that they are turned off during inactivity but lock quickly when turned back on.Fast locking is, therefore, a necessity for spread-spectrum communications, cellular phones, clock/data recovery circuits, etc. Reference Paper: A Novel Successive-Approximation Fast-Locking Digital Phase-Locked Loop SIMULATION VIDEO DEMO PREVIOUS PAGE|NEXT PAGE |