Title :
A sub-harmonic oscillator using an injection-locked DCO
Author :
Ho, Kwok-Ching ; Chan, Clieong-Fat ; Choy, Chili-Sing ; Pun, Kong-Pang
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
The paper presents a sub-harmonic injection-locked oscillator which consists of a differential comparator and even stages of inverter chain. We demonstrate that the oscillator can injection-lock on to a 1/2 and 1/3 sub-harmonic of the free running frequency signal. The oscillator is designed in a 0.35 μm CMOS technology with a free running frequency of 950 MHz. The locking range is equal to 95 MHz and 42 MHz when the oscillator is locked at 475 MHz (1/2 sub-harmonic) and 316 MHz (1/3 sub-harmonic) respectively.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; comparators (circuits); injection locked oscillators; invertors; nonlinear network analysis; nonlinear network synthesis; 0.35 micron; 316 MHz; 475 MHz; 950 MHz; CMOS technology; differential comparator; injection-locked oscillator; inverter chain; subharmonic oscillator; Delay effects; Frequency; Injection-locked oscillators; Inverters; Laser mode locking; Power harmonic filters; Propagation delay; Ring oscillators; Signal generators; Threshold voltage;
Conference_Titel :
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on
Print_ISBN :
0-7803-8647-7
DOI :
10.1109/ICCCAS.2004.1346428
