The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2022
Filed:
Sep. 28, 2021
Xmems Labs, Inc., Santa Clara, CA (US);
Jemm Yue Liang, Sunnyvale, CA (US);
Hsi-Sheng Chen, Fremont, CA (US);
Chiung C. Lo, San Jose, CA (US);
Wen-Chien Chen, New Taipei, TW;
Chun-I Chang, Hsinchu County, TW;
Hao-Hsin Chang, New Taipei, TW;
Chieh-Yao Chang, Taipei, TW;
xMEMS Labs, Inc., Santa Clara, CA (US);
Abstract
A crossover circuit, disposed within a sound producing device including a first sound producing cell driven by a first driving signal and a second sound producing cell driven by a second driving signal, includes a first filter receiving an input signal at an input terminal of the first filter, a first subtraction circuit, and a second filter coupled between the output terminal of the first filter and the second input terminal of the first subtraction circuit. A first input terminal of the first subtraction circuit is coupled to the input terminal of the first filter; a second input terminal of the first subtraction circuit is coupled to an output terminal of the first filter. The crossover circuit produces the first driving signal and the second driving signal according to a first output signal of the first subtraction circuit and a second output signal of the first filter respectively.