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A new auto-lock circuit concept guaranteeing low jitter in PLL frequency synthesizers irrespective of process variations

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3 Author(s)
O'Sullivan, Eugene ; Bipolar Circuit Dev. Lab., NEC Corp, Kanagawa, Japan ; Kawaguchi, M. ; Shimoda, A.

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

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