期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
期号：MULTICON
页码：850
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 in phase-noise reduction ofoscillators with a very simple circuit topology. By using proposed simple modulator many blocks removed so thattotal area is reduced. The proposed quadrature phase-shift keying (QPSK) was fabricated in 90 nm CMOS, occupiesless area.
