A 600mV 1.32mW 75dB-DR 4/sup th/-order baseband analog filter for UMTS receivers

In this paper a 600mV supply voltage 4/sup th/ order low-pass analog filter for UMTS receivers is presented. The filter is designed using two 2/sup nd/ order filtering stages based on biquadratic cells, where a suitable level shifter allows to achieve rail-to-rail input and output swing, while operating at a supply voltage of V/sub th/+3V/sub OV/. From a single 600mV supply voltage in a CMOS 0.13/spl mu/m technology the single-ended analog filter features a THD=-49dB for a 480mVpp output signal amplitude.

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