10-th Order Programmable Low-pass CMOS Integrated Pulse-shaping Filter
Marco Balsi, N. Guerrini, P. Marietti, Giuseppe Scotti, G. Stochino, Alessandro Trifiletti · 2005
In this paper we present the design of a 10-th order pulse shaping filter for QAM modems. The filter has been fabricated in a standard 0.35 /spl mu/m CMOS technology and shows a 37 MHz typical bandwidth with 1:4 tuning capability, more than 60 dB attenuation at twice the bandwidth, less than 1.4 dB pass-band ripple and good linearity in the phase response. Current consumption of the filter core is about 70 mA from a 3.3 V supply. Experimental results in good agreement with post-layout simulations are presented.