In this paper, very simple and insightful sets of noise parameters expressions for a power-constrained simultaneous noise and input matching (PCSNIM) CMOS LNA design technique are newly introduced. Based on the noise parameters expression, the design principle, advantages, and limitations are clearly explained. The proposed LNA is optimized for low voltage, low power 900 MHz Zigbee applications based on 0.25 μm CMOS technology. Measurement results show a power gain of 12 dB, NF and NFmin of 1.35 dB, and IIP3 of -4 dBm while dissipating the DC current of 1.6 mA (only 0.7 mA for NMOS transistor) at a supply voltage of 1.25 V.
"Figure 2 shows the small-signal equivalent of the input circuit including noise models. In Figure 2, the effects of M2 on the noise and frequency response are neglected as well as the parasitic resistance of gate, body, source, drain terminals, and the gate-drain capacitance of M1. Figure 2. Small-signal equivalent of input circuit According to some lengthy algebraic derivations from , the noise parameters for ISD cascode amplifier with Cex capacitor can be expressed as: "
[Show abstract][Hide abstract] ABSTRACT: This paper presents a fully integrated two-stage narrow-band low noise amplifier which optimized to work in 2.45 GHz center frequency. The topology of inductive source degenerated cascode based on power-constrained simultaneous noise and input matching (PCSNIM) technique has been adopted to make the LNA suitable for low power applications based on 0.13 μm Silterra CMOS technology. Post layout simulation results show power gain of 22 dB, NF of 2.06 dB, S11 of -19 dB and S22 of -12 dB while consuming the DC current of 4 mA at supply voltage of 1.2 V.
Circuits and Systems (ICCAS), 2012 IEEE International Conference on; 01/2012
[Show abstract][Hide abstract] ABSTRACT: This paper presents a design of low power CMOS LNA(Low Noise Amplifier) for 2.4 GHz ZigBee applications that is a promising international standard for short area wireless communications. The proposed circuit has been designed using TSMC CMOS process technology and two stage cascade topology by current reuse technique. Two stage cascade amplifiers use the same bias current in the current reused stage which leads to the reduction of the power dissipation. LNA design procedures and the simulation results using ADS(Advanced Design System) are presented in this paper. Simulation results show that the LNA has a extremely low power dissipation of 1.38mW with a supply voltage of 1.0V. This is the lowest value among LNAs ever reported. The LNA also has a maximum gain of 13.38dB, input return loss of -20.37dB, output return loss of -22.48dB and minimum noise figure of 1.13dB.
[Show abstract][Hide abstract] ABSTRACT: An integrated 1.5 GHz low power Low Noise Amplifier (LNA) for portable global positioning system (GPS) receivers is proposed based on SMIC 180 nm 1P6M RF CMOS process. The MOS transistors in the proposed LNA are biased in moderately inverted region to achieve low power. The post-layout simulation results show that, at worst case, a voltage gain of 19 dB is achieved with noise figure (NF) of 4.2 dB, an input third order intermodulation point (IIP3) of -14 dBm and an input return loss of -8 dB. The power consumption of the circuit is only 1 mW at supply voltage of 0.7 V. The ratio of gain to dc power consumption is 19 dB/mW.
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