{'fraction_non_alphanumeric': 0.023696682464454975, 'fraction_numerical': 0.0, 'mean_word_length': 5.401515151515151, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The Third Order Active Low-Pass RC-Filters Based on Differential and Differential Difference Operational Amplifiers

A new structure of the third order low-pass RC-filter (ARCF-III) designed for practical use as a spectrum limiter at the input of various analog-to-digital converters of the A/D Interface of the instrumentation and control system is considered. It is shown that in the proposed ARCF-III the high guaranteed attenuation of the amplitude-frequency characteristic is provided outside the operating band. Three modifications of ARCF-III are developed for its implementation based on differential and differential difference operational amplifiers. Analytical expressions defining the conditions for the synthesis of ARCF-III are presented. The results of computer simulation of the amplitude-frequency characteristic are discussed.