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An ultra-low-voltage ultra-low-power CMOS active mixer

Author: Shirazi Amir   Mirabbasi Shahriar  

Publisher: Springer Publishing Company

ISSN: 0925-1030

Source: Analog Integrated Circuits and Signal Processing, Vol.77, Iss.3, 2013-12, pp. : 513-528

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Abstract

The scaling of CMOS technology has greatly influenced the design of analog and radio-frequency circuits. In particular, as technology advances, due to the use of lower supply voltage the available voltage headroom is decreased. In this paper, after a brief overview of conventional low-power CMOS active mixer structures, we introduce an active mixer structure with sub-mW-level power consumption that is capable of operating from a supply voltage comparable or lower than the threshold voltage of the transistor. In addition, the proposed architecture provides a performance and conversion gain (CG) that compares favorably or exceeds those of the state-of-the-art designs. As a proof-of-concept, a wide-band DC to 8.5 GHz down-conversion mixer is designed and fabricated in a 90-nm CMOS process. Measurement results show that the mixer achieves a CG as high as 18 dB while consuming 98 μW from a 0.3-V supply.