期刊名称：International Journal of Multimedia and Ubiquitous Engineering
印刷版ISSN：1975-0080
出版年度：2015
卷号：10
期号：11
页码：397-406
DOI：10.14257/ijmue.2015.10.11.38
出版社：SERSC
摘要：A novel way of achieving the well-known FSK(Frequency-Shift Keying) modulation was introduced and verified. A simple form of CMOS ring-oscillator, that is generating a GHz level of frequency, was used as a base frequency generator. With its fractal structure, a local change in the oscillator will yield a global frequency change, which is to serve for the FSK. A local change is done with different number of inverting amplifiers in the ring oscillator with a multiplexer. Depending on how many cell changes, the frequency shifts are controlled and can be selected. The measured frequency difference between the shifts was from 9.2% up to 22.5%, in GHz range in CMOS SPICE simulations. Layout for CMOS implementation is also included.
关键词：Fractal; Multiplexers; CMOS Ring Oscillator; Frequency Shift Keying
