A novel low‐power receiver topology for RF and microwave applications |
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Authors: | Domenico Zito |
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Affiliation: | Radio‐Frequency & Microwave Integrated Circuits Lab (RFLab), Dipartimento di Ingegneria dell'Informazione: Elettronica, Informatica, Telecomunicazioni Università di Pisa, Via Caruso, I‐56122 Pisa, Italy |
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Abstract: | A novel low‐power receiver topology for radio‐frequency and microwave applications is presented. The proposed solution exploits a simple connection between the low‐noise amplifier and the subsequent mixer, which is realized by means of a high‐value resistor and a current mirror, achieving low noise and high linearity performance with an extremely low power consumption. The criteria for its optimal design are derived in order to accomplish the main trade‐offs among noise figure (NF), linearity, and current consumption performance. As a case of study, the new topology has been designed in the case of I/Q direct conversion receiver for IEEE 802.15.4 standard (ZigBee) applications at 2.45 GHz. The receiver exhibits a NF of 8.7 dB, 50Ω input impedance, a voltage gain of 26 dB, an input‐referred third‐order intercept point of ?13 dBm, and a power consumption of 8.6 mW, which represent one of the best performance trade‐offs obtained in the literature. Copyright © 2008 John Wiley & Sons, Ltd. |
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Keywords: | low‐power radio receiver low‐noise amplifier mixer WPAN RFID |
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