A CMOS gyrator low-IF filter for a dual-mode Bluetooth/ZigBee transceiver
- 29 August 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 40 (9) , 1872-1879
- https://doi.org/10.1109/jssc.2005.848146
Abstract
A low-IF polyphase channel filter for a dual-mode Bluetooth/Zigbee transceiver is described. Implemented in a standard 0.18-/spl mu/m CMOS process, the filter has a fifth-order 0.5-dB equiripple bandpass response and employs novel transconductor and preamplifier designs. It consumes /spl les/1 mW and achieves image band rejection /spl ges/44 dB, input referred noise of /spl les/52.2 /spl mu/Vrms and input referred third-order intermodulation intercept of /spl ges/20 dBVp, which gives a spurious-free dynamic range of /spl ges/68.4 dB. Chip area including its tuning circuit is 0.23 mm/sup 2/.Keywords
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