Tien, C.-W.C.-W.TienSHEN-IUAN LIU2020-06-112020-06-11201915497747https://scholars.lib.ntu.edu.tw/handle/123456789/499891https://www.scopus.com/inward/record.uri?eid=2-s2.0-85048150840&doi=10.1109%2fTCSII.2018.2844331&partnerID=40&md5=8cde4541f668193ac010a89a89540f3dAn 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.Clock multiplier; frequency calibrator; injection-locked; low jitter; phase noise; process-voltage-temperature variations; reference spur[SDGs]SDG7Circuit 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 circuitsjournal article10.1109/TCSII.2018.28443312-s2.0-85048150840