Circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system
US8447046B2 · kind B2 · utility
4Cited by
16References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2011 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Feb 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/007
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system. It mainly comprises a first resistor (R1); a capacitor (Cout); a first switch (SW1); a second switch (SW2); a soft start device; a first feedback amplifier; and a second feedback amplifier. By using the three-stage of power-on sequence, the present invention can effectively suppress the pop noise when the audio driver is power on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.