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Pat. 11271583 United States, Int. Cl.22 H03M 1/74, H02M 3/158, H03M 3/00, H04R 3/00. Current digital-to-analog converter with high-impedance output : Appl. N 16/945288 : Filed 31.07.2020 : Pub. 08.03.2022 : / John L. Melanson, Johann G. Gaboriau, Lei Zhu, Wai-Shun Shum, Xiaofan Fei, Leyi Yin ; Assignee Cirrus Logic Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11271583/en?oq=US11271583.html (дата обращения: ДД.ММ.ГГГГ).