A polyphase transconductor-capacitor (Gm-C) channel filter for a low-IF Bluetooth transceiver is described. It is designed in a 2.5 V, 0.25 Μm standard CMOS process and employs a novel fully differential transconductor. Simulated performance is presented showing good fifth-order bandpass filter response (1 MHz centre frequency, 1.2 MHz bandwidth), 1 dB compression at 1.3 V pk-pk, signal-to-noise ratio of 68.2 dB and an input third-order intermodulation product of 34.2 dBV. The power consumption is 1 mW and estimated chip area is 0.1 mm2.
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