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WCDMA multicarrier receiver for base-station applications

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8 Author(s)
Ryynanen, J. ; Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo ; Hotti, M. ; Saari, V. ; Jussila, J.
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The multicarrier receiver IC described in this paper receives four adjacent WCDMA channels simultaneously in order to reduce the component count of a base-station. The receiver uses low-IF architecture and it is fabricated with a 0.25-mum SiGe BiCMOS process to meet the high-performance requirements set by the base-station application. The receiver includes a dual-input low-noise amplifier (LNA), quadrature mixers, a local-oscillator (LO) divider, IIP2 calibration circuits, 10-MHz low-pass filters, and ADC buffers. The receiver noise figures, measured over the downconverted WCDMA channels centered at 2.5-MHz and 7.5-MHz intermediate frequencies, are 3.0 dB and 2.6 dB, respectively. The receiver achieves 47-dB voltage gain and -12-dBm out-of-band IIP3 and consumes 535mW from a 2.5-V supply

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:41 ,  Issue: 7 )

Date of Publication:

July 2006

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