This paper presents a 4th-order low-pass continuous-time filter with 24MHz bandwidth. Using cross-coupled MOS transistors combined with capacitors and resistors, this architecture synthesizes two complex-conjugate-poles pairs. The filter is designed and optimized to feature high-linearity along all filter passband, and, in particular, at the cut-off frequency edge. The filter consumes 100μA with 1.8V voltage supply, and achieves 45μW/pole power consumption, 150μVRMS input-referred noise, 16dBm IIP3 with 2-3MHz input tones and 5dBm IIP3 near the cut frequency.
D'Amico, A., DE MATTEIS, M., D'Amico, S., Berti, C., Crespi, L., Baschirotto, A. (2015). A 4th-order 100µA Diode-C-based Filter with 5dBm-IIP3 at the 24MHz cut-off frequency. In ESSCIRC CONFERENCE 2015 - 41ST EUROPEAN SOLID-STATE CIRCUITS CONFERENCE (ESSCIRC) (pp.36-39). IEEE Computer Society [10.1109/ESSCIRC.2015.7313822].
A 4th-order 100µA Diode-C-based Filter with 5dBm-IIP3 at the 24MHz cut-off frequency
D'AMICO, ANTONIOPrimo
;DE MATTEIS, MARCELLOSecondo
;BASCHIROTTO, ANDREAUltimo
2015
Abstract
This paper presents a 4th-order low-pass continuous-time filter with 24MHz bandwidth. Using cross-coupled MOS transistors combined with capacitors and resistors, this architecture synthesizes two complex-conjugate-poles pairs. The filter is designed and optimized to feature high-linearity along all filter passband, and, in particular, at the cut-off frequency edge. The filter consumes 100μA with 1.8V voltage supply, and achieves 45μW/pole power consumption, 150μVRMS input-referred noise, 16dBm IIP3 with 2-3MHz input tones and 5dBm IIP3 near the cut frequency.
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