title: A fully integrated continuous-time 50-Hz notch filter with center frequency tunability.
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 0.18 nm 1P6M process with the die area of 0.06 mm(2). Post-annotated simulation indicated the continuous-time notch filter was capable of providing 55.4 dB attenuation for the 50 Hz power line interference and its center frequency was tunable against process variations.
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, 1068 Xueyuan Avenue, Shenzhen University Town, Shenzhen, PR China.
authors.forename: Haixi
authors.initials: H
authors.lastname: Li
authors.forename: Jinyong
authors.initials: J
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
mesh_terms: D004562:Electrocardiography; D004569:Electroencephalography; D004576:Electromyography; D004581:Electronics; D004596:Electroretinography; D006801:Humans