Electronic device having sound output module
US7046082B2 · kind B2 · utility
999Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2003 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Jun 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/21
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
the output amplifiers requiring a bias voltage can be activated or deactivated individually, and a bias acceleration circuit for rapidly increasing the magnitude of a bias voltage in time can be provided in or with the bias circuit, whereby even in case of the capacitance of the capacitor included in the bias circuit being increased for improving the power supply rejection ratio (PSRR), the rise in the bias voltage can be increased so that the pop sound which arises when the bias circuit is activated can be still diminished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.