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:
Nov. 18, 2014
Filed:
Apr. 24, 2012
Junwei Huang, Chengdu, CN;
Junwei Huang, Chengdu, CN;
IPGoal Microelectronics (SiChuan) Co., Ltd., Chengdu, Sichuan Province, CN;
Abstract
A POP noise suppressing circuit includes a blocking capacitor, an outputting element connected to the blocking capacitor, a current generating unit, a charging unit connected to the current generating unit, a discharging unit connected to the current generating unit, a switching unit connected to the charging unit and the discharging unit and a power amplifying unit connected between the switching unit and the blocking capacitor. The current generating unit provides two slowly increasing currents respectively to the charging unit and the discharging unit. The switching unit is for switching between the charging unit and the discharging unit. The charging unit forms a charging current. The discharging unit forms a discharging current. The voltage of the blocking capacitor increases smoothly in a process of powering on and decreases smoothly in a process of powering off. A POP noise suppressing method is also provided.