Title :
A 4th order Gm-C filter with 10MHz bandwidth and 39dBm IIP3 in 65nm CMOS
Author :
Abdulaziz, Mohammed ; Tormanen, Markus ; Sjoland, Henrik
Author_Institution :
Dept. of Electr. & Inf. Technol. (EIT), Lund Univ., Lund, Sweden
Abstract :
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.
Keywords :
Butterworth filters; CMOS analogue integrated circuits; active filters; integrated circuit design; linearisation techniques; low-pass filters; low-power electronics; operational amplifiers; CMOS technology; OTA design; active filters; bandwidth 10 MHz; compression point; current consumption; in-band IIP3; linearization technique; low power 4th order Butterworth Gm-C low pass filter; operational transconductance amplifier; out-of-band IIP3; size 65 nm; voltage 1.2 V; CMOS integrated circuits; Dynamic range; Linearity; Noise; Temperature measurement; Tuning; Voltage control; Active filters; CMOS technology; intermodulation distortion; low pass filters; low power electronics; operational transconductance amplifier;
Conference_Titel :
European Solid State Circuits Conference (ESSCIRC), ESSCIRC 2014 - 40th
Conference_Location :
Venice Lido
Print_ISBN :
978-1-4799-5694-4
DOI :
10.1109/ESSCIRC.2014.6942098
