Design of a 50Hz notch filter using the universal active filter chip UAF42

作者：Yan Liang; Chen Rujun; Liu Shi; Chen Yiping

来源：Chinese Journal of Scientific Instrument, 2006, 27(8): 924-927.

To suppress the 50Hz interference, a notch filter is needed in pre-stage circuit. The conventional twin-T network requires high-precision components and strict symmetry, but it is difficult to tune. The 50Hz notch filter using the universal active filter chip (UAF42) eliminates above disadvantages. The experiment results show that the 50Hz notch filter using UAF42 meets the design requirements. The design has the advantages of easy tuning and lower component tolerance requirement.

• 出版日期2006