KUMNGERN, Montree, Fabian KHATEB a Tomasz KULEJ. 0.5 V fifth-order butterworth low-pass filter using multiple-input OTA for ECG applications. SENSORS [online]. MDPI, 2020, 20(24), 1-16 [cit. 2023-05-30]. ISSN 1424-8220. Dostupné z: doi:10.3390/s20247343