Title :
10-th order programmable low-pass CMOS integrated pulse-shaping filter
Author :
Balsi, M. ; Guerrini, N. ; Marietti, P. ; Scotti, G. ; Stochino, Giovanni ; Trifiletti, A.
Author_Institution :
Dipt. Ing. Elettronica, Univ. di Roma, Italy
Abstract :
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 μm 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.
Keywords :
CMOS integrated circuits; continuous time filters; low-pass filters; modems; programmable filters; pulse shaping circuits; quadrature amplitude modulation; 0.35 micron; 10-th order programmable filter; 3.3 V; 37 MHz; CMOS filter; QAM modems; integrated pulse-shaping filter; low-pass filter; phase response linearity; Band pass filters; Bandwidth; CMOS technology; Capacitors; Chebyshev approximation; Digital filters; Finite impulse response filter; Intersymbol interference; Pulse shaping methods; Quadrature amplitude modulation;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465332
