US Patent Issued to RDA MICROELECTRONICS (SHANGHAI) on Oct. 21 for "Audio amplifying circuit and playing device" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,451,849, issued on Oct. 21, was assigned to RDA MICROELECTRONICS (SHANGHAI) Co. LTD. (Shanghai).

"Audio amplifying circuit and playing device" was invented by Yiwei Song (Shanghai) and Tao Zhou (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides an audio amplifying circuit and a playing device, including: N-order filters and an integrated circuit; after an original audio signal passes through the N-order filters, a filtered signal is obtained; after the filtered signal passes through the integrated circuit, a corresponding digital signal is output; where the number of operational amplifiers adopted in the N-order fil...