Title :
A 70-mW seventh-order filter with 7-50 MHz cutoff frequency and programmable boost and group delay equalization
Author :
Rezzi, Francesco ; Bietti, Ivan ; Cazzaniga, Marco ; Castello, Rinaldo
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
fDate :
12/1/1997 12:00:00 AM
Abstract :
A seventh-order phase equiripple continuous time filter implementing pulse shaping and noise filtering for partial response maximum likelihood (PRML) read channel applications is presented. The 7-50 MHz cutoff frequency, amount of boost, and group-delay slope are programmable via 7-b digital-to-analog converters (DAC´s). At 50 MHz fc, power consumption is 70 mW and output swing for 1% distortion is more than 500 mVpp. The transconductance capacitance (Gm-C) filter is built in a 0.7-μm 10-GHz BiCMOS technology
Keywords :
BiCMOS analogue integrated circuits; continuous time filters; delay circuits; digital-analogue conversion; equalisers; maximum likelihood detection; partial response channels; programmable filters; pulse shaping circuits; 0.7 micron; 7 bit; 7 to 50 MHz; 70 mW; BiCMOS technology; Gm-C filter; HDD; cutoff frequency; digital-to-analog converter; group delay equalization; noise filtering; output swing; partial response maximum likelihood read channel; power consumption; programmable boost; pulse shaping; seventh-order phase equiripple continuous time filter; transconductance capacitance filter; Capacitance; Cutoff frequency; Digital-analog conversion; Energy consumption; Filtering; Filters; Noise shaping; Phase noise; Pulse shaping methods; Transconductance;
Journal_Title :
Solid-State Circuits, IEEE Journal of
