期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2014
卷号：2
期号：11
出版社：S&S Publications
摘要：QPSK or Quadrature Phase-Shift Keying is a higher order modulation scheme used in digitalmodulation. A direct injection locked QPSK modulator uses VCO for minimize the area of the conventional modulator.In this project injection locking scheme is used since injection locking has an advantage inphase-noise reductionofoscillators withavery simplecircuittopology. By using proposed simple modulator many blocks removed so that totalarea is reduced. The proposed quadraturephase-shiftkeying (QPSK) was fabricated in 90 nm CMOS, occupies less area.
