Abstract
A 0.5-V low noise amplifier (LNA) for 2.4GHz medical application based on 0.18μm CMOS process is presented in this paper. To achieve low noise and high gain with the constraint of low voltage and low power consumption, a novel modified complementary current-reused LNA using forward body bias technology is proposed. A diode connected MOSFET forward bias technique is employed to minimize the body leakage and improve the noise performance. A notch filter isolator with harmonic rejection is constructed to improve the linearity of low voltage. The measured results show that the proposed LNA achieves a power gain of 18.7dB and a noise figure of 1.52dB, while the consuming DC current is only 4.2mA at supply voltage of 0.5V.
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