论文信息 - A 4th order Gm-C filter with 10MHz bandwidth and 39dBm IIP3 in 65nm CMOS

A 4th order Gm-C filter with 10MHz bandwidth and 39dBm IIP3 in 65nm CMOS

Gm-C filters suffer from limited dynamic range due to a trade-off between noise and linearity in OTA design. This paper therefore presents a filter with a linearization technique to break this trade-off. This technique is demonstrated by a low power 4th order 10MHz Butterworth Gm-C low pass filter. The filter was implemented in 65nm CMOS technology with a core area of 0.19mm2 and a total current consumption of 3.5mA from a 1.2V supply. The measured input referred noise is 31nV/√Hz, the maximum in-band IIP3 is 39dBm, the out-of-band IIP3 is 34dBm, and the compression point is 8.2dBm.

Henrik Sjöland | Mohammed Abdulaziz | Markus Törmänen

[1] Pavan Kumar Hanumolu,et al. A 0.55V 61dB-SNR 67dB-SFDR 7MHz 4th-order Butterworth filter using ring-oscillator-based integrators in 90nm CMOS , 2012, 2012 IEEE International Solid-State Circuits Conference.

[2] Slawomir Koziel,et al. Highly linear CMOS triode transconductor for VHF applications , 2012, IET Circuits Devices Syst..

[3] Antonio Liscidini,et al. Current-Mode, WCDMA Channel Filter With In-Band Noise Shaping , 2010, IEEE Journal of Solid-State Circuits.

[4] J. L. Pennock. CMOS triode transconductor for continuous-time active integrated filters , 1985 .

[5] Jose Silva-Martinez,et al. A 2-V/sub pp/ 80-200-MHz fourth-order continuous-time linear phase filter with automatic frequency tuning , 2002 .

[6] Guido Torelli,et al. CMOS triode-transistor transconductor for high-frequency continuous-time filters , 1994 .

[7] Nasser Masoumi,et al. A CMOS 4.35-mW +22-dBm IIP3 Continuously Tunable Channel Select Filter for WLAN/WiMAX Receivers , 2011, IEEE Journal of Solid-State Circuits.