{'fraction_non_alphanumeric': 0.025518341307814992, 'fraction_numerical': 0.003189792663476874, 'mean_word_length': 5.408163265306122, '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}}
Analog implementation of an active noise controller system for portable audio applications

The active noise controller (ANC) system described here implements a practical design that significantly decreases background noise of signals common to most portable audio devices. This is achieved by a mixture of conventional ANC blocks with less traditional implementations, including a combined FIR/IIR structure using switched-capacitor blocks such as summers, integrators, multipliers, and delays. The proposed design also works as a stand-alone system and it has been successfully implemented on a 1.2-/spl mu/m CMOS technology.