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. 14, 2015
Filed:
Sep. 29, 2011
Wenjing Wang, Beijing, CN;
Jianting Wang, Beijing, CN;
Rongrong Bai, Beijing, CN;
Jing Cao, Rancho Santa Margarita, CA (US);
Wenjing Wang, Beijing, CN;
Jianting Wang, Beijing, CN;
Rongrong Bai, Beijing, CN;
Jing Cao, Rancho Santa Margarita, CA (US);
Beijing KT Micro, Ltd., Beijing, CN;
Abstract
A processing chip for a digital microphone and related input circuit and a digital microphone are described herein. In one aspect, the input circuit for a processing chip of a digital microphone includes: a PMOS transistor, a resistor, a current source, and a low-pass filter. The described processing chip possesses high anti high-frequency interference capabilities and the described input circuit possesses high high-frequency power supply rejection ratio.