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A 2.7-V dual-frequency single-sideband mixer [for PCS]

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1 Author(s)
Ting-Ping Liu ; Bell Labs., Lucent Technol., Holmdel, NJ, USA

The single-sideband (SSB) mixer is attractive since it can provide either upper or lower sideband output through an electronic control. However, it is essential for the dual-band SSB mixer to achieve high sideband rejections in both frequency bands. The sideband rejection depends on the system specifications and actual off-chip filters used in the handset, and is typically -35 dB or lower. This paper describes the design of a 0.8/2-GHz BiCMOS dual-frequency single-sideband mixer. A phase tracking technique is employed to combat the inaccuracy of quadrature shifters due IC process variations and to achieve high sideband rejections (<-35 dB) for both frequencies.

Published in:

VLSI Circuits, 1998. Digest of Technical Papers. 1998 Symposium on

Date of Conference:

11-13 June 1998