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 degener...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 Gil- bert 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 and an input return loss of - 22.3dB. The fully differential figure of 2.4dB,an input ldB compression point of - 22dBm, circuits only draw 5.4mW from a 1.8V supply.展开更多
文摘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 Gil- bert 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 and an input return loss of - 22.3dB. The fully differential figure of 2.4dB,an input ldB compression point of - 22dBm, circuits only draw 5.4mW from a 1.8V supply.