A PVT-Tolerant Injection-Locked Clock Multiplier with a Frequency Calibrator Using a Delay Time Detector
Journal
IEEE Transactions on Circuits and Systems II: Express Briefs
Journal Volume
66
Journal Issue
2
Pages
177-181
Date Issued
2019
Author(s)
Tien, C.-W.
Abstract
An injection-locked clock multiplier (ILCM) using a frequency calibrator is presented to tolerate the process, voltage, and temperature variations. By detecting the timing error between the delay cells of a voltage-controlled oscillator (VCO) with and without an injection pulse, the frequency calibrator adjusts the oscillation frequency of a VCO. It reduces the reference spur and improves the rms jitter. This ILCM is fabricated in 40-nm CMOS technology and its active area is 0.012 mm2. The power is 2.55 mW from a supply of 1.1 V at 2.4 GHz with 150-MHz reference frequency. The measured reference spur is -61.28 dBc and the rms jitter integrated the phase noise from 10 kHz to 100 MHz is 479 fs. © 2004-2012 IEEE.
Subjects
Clock multiplier; frequency calibrator; injection-locked; low jitter; phase noise; process-voltage-temperature variations; reference spur
Other Subjects
Circuit oscillations; Clocks; Jitter; Oscillistors; Phase noise; Temperature distribution; Variable frequency oscillators; Clock multipliers; frequency calibrator; Injection locked; Low jitters; Reference spur; Temperature variation; Frequency multiplying circuits
Type
journal article