A new auto-lock circuit concept is presented for PLL synthesizers. This concept was applied to a 622 MHz embedded BiCMOS PLL. It guarantees that the PLL automatically locks at (622 MHz±10%) with less than 40 ps intrinsic peak-to-peak jitter irrespective of process variations and maintains this lockover 0°C to 125°C operating temperature range. This auto-lock circuit requires no external pins or expensive trimming process
Published in:
Bipolar/BiCMOS Circuits and Technology Meeting, 1996., Proceedings of the 1996
Date of Conference: 29 Sep-1 Oct 1996