ALEXANDRIA, Va., June 19 -- United States Patent no. 12,335,694, issued on June 17, was assigned to AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) Co. LTD. (Shenzhen, China).
"Single-end-to-differential microphone circuit and electronic equipment" was invented by Dong Han (Singapore) and Chuationg Kee (Singapore).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a single-end-to-differential microphone circuit and an electronic equipment, including: an amplifier, a microphone connected to the positive input end of the amplifier, a coupling capacitor CAC connected to the negative input end of the amplifier, a first feedback capacitor CFB1 connected to the negative output end of the amplifier, ...