Title :
Design consideration for LPF with gain boosting in GHz-range applications
Author :
Hussien, Faisal ; Assaad, Rida ; Silva-Martinez, Jose ; Sanchez-Sinencio, Edgar
Author_Institution :
Analog & Mixed Signal Center, Texas A & M Univ., College Station, TX
Abstract :
A 0.18 mum CMOS fifth order Butterworth low-pass filter with 24 dB programmable gain boost at its 1.2 GHz cut-off frequency for HDD applications is presented. A new Gm-LC architecture is proposed using feedforward path techniques to achieve the required boost. The gain of the feedforward path can be controlled to provide the variable boost. Simulation results shows that a 28/46 mA is drawn from a 1.8 V supply in the no-boost/max-boost cases respectively. Group delay variations for different boost values are limited to 10% from the no-boost case. At the nominal output voltage swing of 250 mVpp at 1.2 GHz, a THD of -42 dB is obtained
Keywords :
Butterworth filters; CMOS integrated circuits; UHF filters; UHF integrated circuits; low-pass filters; 0.18 micron; 1.2 GHz; 1.8 V; Butterworth low-pass filter; CMOS fifth order filter; boost values; feedforward path techniques; gain boosting; group delay variations; Boosting; Cutoff frequency; DVD; Delay; Digital signal processing chips; Hard disks; Low pass filters; Signal design; System-on-a-chip; Voltage;
Conference_Titel :
Circuits and Systems, 2005. 48th Midwest Symposium on
Conference_Location :
Covington, KY
Print_ISBN :
0-7803-9197-7
DOI :
10.1109/MWSCAS.2005.1594299
