| Citation: |
Wang Liangkunn, Ma Chengyan, Ye Tianchun. A 5.4mW Low-Noise High-Gain CMOS RF Front-End Circuit for Portable GPS Receivers[J]. Journal of Semiconductors, 2008, In Press.
Wang L K N, Ma C Y, Ye T C. A 5.4mW Low-Noise High-Gain CMOS RF Front-End Circuit for Portable GPS Receivers[J]. J. Semicond., 2008, 29(10): 1963.
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A 5.4mW Low-Noise High-Gain CMOS RF Front-End Circuit for Portable GPS Receivers
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Abstract
This paper describes a CMOS low noise amplifier (LNA) plus the quadrature mixers intended for use in the front-end of portable global positioning system (GPS) receivers.The LNA makes use of an inductively degenerated input stage and power-constrained simultaneous noise and input matching techniques.The quadrature mixers are based on a Gilbert cell type.The circuits are implemented in a TSMC 0.18μm RF CMOS process.Measurement results show that a voltage conversion gain of 35dB is achieved with a cascade noise figure of 2.4dB,an input 1dB compression point of -22dBm,and an input return loss of -22.3dB.The fully differential circuits only draw 5.4mW from a 1.8V supply.-
Keywords:
- CMOS RF IC,
- GPS,
- low-noise amplifiers,
- mixers,
- receivers,
- noise figure
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References
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Proportional views
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