A time-constant calibrated phase-locked loop with a fast-locked time
Journal
IEEE Transactions on Circuits and Systems II: Express Briefs
Journal Volume
54
Journal Issue
1
Pages
34-37
Date Issued
2007-01
Author(s)
Abstract
A time-constant calibrated phase-locked loop with a fast-locked time is presented. A variable capacitance multiplier (VCM) is developed to adjust the equivalent capacitance in the loop filter. And a calibration circuit is used to allow the time constant of the loop filter to track with the reference clock. By using the proposed time-constant calibration circuit and the VCM, the fast acquisition time is achieved and the loop capacitance is also multiplied. A prototype has been fabricated in a 0.35-μm CMOS process to demonstrate the proposed circuit. © 2007, IEEE. All rights reserved.
Subjects
Fast locked phase-locked loop (PLL); time-constant calibration; variable capacitance multiplier (VCM)
SDGs
Other Subjects
Calibration; Capacitance; CMOS integrated circuits; Digital filters; Fast locked; Time-constant calibration; Variable capacitance multiplier (VCM); Phase locked loops
Type
journal article