Title :
A Multi-Band Quadrature Clock Generator With High-Pass-Filtered Pulse Injection Technique
Author :
Sang-yeop Lee ; Kamimura, Taeko ; Yonezawa, Shin ; Shirane, A. ; Ikeda, Shoji ; Ito, H. ; Ishihara, Noboru ; Masu, Kazuya
Author_Institution :
Solutions Res. Lab., Tokyo Inst. of Technol., Yokohama, Japan
Abstract :
A high-pass-filtered (HPF) pulse injection technique is proposed to reduce spurs near the carrier signal due to injection locking. By using this technique, a multi-band quadrature clock generator consisting of a wide-frequency range injection-locked PLL and a frequency-selectable local buffer is demonstrated. The proposed clock generator was fabricated in a 65 nm CMOS. For a 100 MHz reference, the circuit can output 1.0, 2.0, and 4.0 GHz quadrature outputs with an eight-phase VCO and the buffer. It shows an 1 MHz-offset phase noise -105 dBc/Hz and a reference spur level of -50 dBc at 2.0 GHz, with enabling HPF pulse injection. The total power consumption is lower than 32 mW at 4 GHz.
Keywords :
clocks; high-pass filters; injection locked oscillators; phase locked loops; voltage-controlled oscillators; HPF pulse injection; VCO; carrier signal; frequency 100 MHz; frequency 2 GHz; frequency 4 GHz; frequency selectable local buffer; high pass filtered pulse injection technique; injection locking; multiband quadrature clock generator; power consumption; reference spur level; size 65 nm; wide frequency range injection locked PLL; Clocks; Delay; Harmonic analysis; Injection-locked oscillators; Phase locked loops; Phase noise; Voltage-controlled oscillators; CMOS; high-pass filter (HPF); injection locking (IL); phase-locked loop (PLL); ring VCO;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2013.2239634
