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A 900MHz low voltage low power highly linear mixer for direct-conversion receivers

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3 Author(s)
Moon-Su Yang ; Inf. & Commun. Univ., Daejeon, South Korea ; Hye-Ryoung Kim ; Sang-Gug Lee

This paper presents a 900MHz low voltage, low power down-conversion mixer with high linearity for direct-conversion receivers. As a way to improve the third-order linearity, this paper proposes a very linear transconductance amplifier in which the size of the transistors is optimized to minimize the third-order intermodulation distortion (IMD3). A folded mixer topology is used in the designed mixer to enable the mixer to operate at low supply voltage. The design is based on a standard 0.25μm CMOS technology, and the simulation results show 15dBm of input IP3, 80dBm of input IP2, and -6.5dB of power conversion gain while dissipating a total current of 3mA from 1.25V supply.

Published in:

Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on  (Volume:3 )

Date of Conference:

14-17 Dec. 2003