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A Weak-Inversion Low-Power Active Mixer for 2.4 GHz ISM Band Applications

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5 Author(s)
Do, A.V. ; Nanyang Technol. Univ., Singapore, Singapore ; Chirn Chye Boon ; Do, A.V. ; Kiat Seng Yeo
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This work describes a fully integrated active mixer designed in 0.18 mum CMOS technology for 2.4 GHz industrial, scientific and medical (ISM) band applications. The mixer uses a source driven local oscillator (LO) to integrate the RF-LO buffering with the active mixer, and weakly inverted input MOSFETs to improve the gain and noise performance. The double-balanced quadrature mixer has a measured conversion gain of 32 dB with a double sideband (DSB) noise figure (NF) of 8.5 dB at 30 MHz intermediate frequency (IF) while consuming only 0.56 mA of current from a 1.8 V supply.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:19 ,  Issue: 11 )