Abstract
Low Noise Amplifier (LNA) is a significant part in Radio Frequency (RF) receivers and plays a key role in the chip size and the implementation cost. An LNA for RF receivers utilizing the active inductor is presented. The proposed design is an alternative solution to overcome the usage of passive inductors to reduce the chip area. Besides, the active inductor reduces the parasitic capacitors affect at high frequencies. Designed in 0.18-μm CMOS process, the LNA achieves a voltage gain of 20dB, a minimum Noise Figure (NF) of 3.1 dB with low power consumption and good input and output impedance matching at 2.45 GHz. With 0.003 mm2 chip area, the proposed design is suitable for portable wireless communication devices. DOI: http://dx.doi.org/10.5755/j01.eee.19.5.2158
Highlights
Radio Frequency (RF) transmitters and receivers are used in many applications such as Global Positioning System (GPS), Wireless Fidelity (Wi-Fi), Bluetooth, RF Identification (RFID) systems etc
Low noise amplifier (LNA) design depends on the balancing of low power, high gain and low noise figure (NF)
To avoid using passive inductors and implementation of active inductors for achieving high gain as well as reduced NF, a different approach of LNA is proposed in this paper
Summary
Radio Frequency (RF) transmitters and receivers are used in many applications such as Global Positioning System (GPS), Wireless Fidelity (Wi-Fi), Bluetooth, RF Identification (RFID) systems etc. LNA design depends on the balancing of low power, high gain and low noise figure (NF). In [4] CGLNA current-reuse technique is adopted to improve the transconductance at the expense of greater cost as it uses passive inductors. Another technique of inductor-less LNA is used to reduce the chip size and overall cost. Noise cancelling technique is used to get lower NF This technique is not effective at high frequency as in [5], [6]. Noise cancelling techniques are used in [7], [8] but the disadvantage is the low voltage gain. To avoid using passive inductors and implementation of active inductors for achieving high gain as well as reduced NF, a different approach of LNA is proposed in this paper
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