Performance Improvement of the Analog ANC Circuit for a Duct by Insertion of an All-Pass Filter

Tatsuki HYODO  Gaku ASAKURA  Kiwamu TSUKADA  Masashi KATO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E96-A   No.4   pp.824-825
Publication Date: 2013/04/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E96.A.824
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Noise and Vibration
analog circuit,  ANC,  all-pass filter,  

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This letter proposes an analog active noise control (ANC) circuit with an all-pass filter (APF). To improve performance of the previously reported analog ANC circuit, we inserted an APF to the circuit in order to fit phases of a noise and an electrical signal in the circuit. As a result, we confirmed improvement of the noise canceling effect of the analog ANC circuit.