Title :
A fully integrated continuous-time 50-Hz notch filter with center frequency tunability
Author :
Li, Haixi ; Zhang, Jinyong ; Wang, Lei
Author_Institution :
Shenzhen Inst. of Adv. Technol., Shenzhen, China
fDate :
Aug. 30 2011-Sept. 3 2011
Abstract :
A novel continuous-time notch filter based on current steering technique was described in this paper. The second-order notch filter consisted of two integrators, one unity-gain inverter and two alpha blocks that were fully integrated onto a silicon chip. The circuit was implemented in SMIC mixed-signal 0.18nm 1P6M process with the die area of 0.06 mm2. Post-annotated simulation indicated the continuous-time notch filter was capable of providing 55.4dB attenuation for the 50 Hz power line interference and its center frequency was tunable against process variations.
Keywords :
biomedical equipment; electrocardiography; electroencephalography; electromyography; elemental semiconductors; invertors; medical signal processing; notch filters; silicon; SMIC mixed-signal 0.18nm 1P6M process; center frequency tunability; frequency 50 Hz; fully integrated continuous-time 50-Hz notch filter; integrators; post-annotated simulation; power line interference; second-order notch filter; silicon chip; size 0.18 mum; unity-gain inverter; Capacitors; Gabor filters; Inverters; Low pass filters; Operational amplifiers; Resistors; Silicon; Electrocardiography; Electroencephalography; Electromyography; Electronics; Electroretinography; Humans;
Conference_Titel :
Engineering in Medicine and Biology Society, EMBC, 2011 Annual International Conference of the IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-4121-1
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2011.6090593
