Title :
A low-power, 5-70 MHz, 7th-order filter with programmable boost, group delay, and gain using instantaneous companding
Author :
Baki, Rola A. ; El-Gamal, Mourad N.
Author_Institution :
Microelectron. & Comput. Syst. Lab., McGill Univ., Montreal, Que., Canada
Abstract :
A seventh-order 0.05° equiripple linear-phase continuous-time filter employing, for the first time, instantaneous companding, was designed and integrated in a mature bipolar process. The amount of boost (up to 13 dB) and group-delay adjustment (30%) are digitally programmable. The DC gain is controllable up to 10 dB, and the -3 dB frequency (fc) is tunable from 5 to 70 MHz. The output swing for 1% TED is higher than 100m Vpp, with a 1.5 V supply. The filter consumes very low power (5-13 mW for fc=70MHz) compared to conventional implementations (e.g. 120 mW for fc=100 MHz)
Keywords :
bipolar analogue integrated circuits; circuit tuning; compandors; continuous time filters; equiripple filters; linear phase filters; low-power electronics; programmable filters; 1.5 V; 5 to 13 mW; 5 to 70 MHz; DC gain; bipolar process; frequency tuning; group delay; instantaneous companding; low-power seventh-order equiripple linear-phase continuous-time filter; output swing; programmable boost; Bandwidth; Delay effects; Energy consumption; Filtering; Integrated circuit technology; Matched filters; Microelectronics; Permission; Signal processing; Voltage;
Conference_Titel :
Low Power Electronics and Design, International Symposium on, 2001.
Conference_Location :
Huntington Beach, CA
Print_ISBN :
1-58113-371-5
DOI :
10.1109/LPE.2001.945422
