Power supply circuit including voltage regulator and headphone driving circuit employing the same
US8452025B2 · kind B2 · utility
1Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2011 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Jan 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/78
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power supply circuit including a voltage regulator and a headphone driving circuit employing the same are disclosed. In accordance with the present invention, the power supply circuit may provide stable power supply to the amplifier since the power supply circuit generates the constant voltage +Vreg and the constant voltage −Vreg from +VDD robust to stronger than a power noise, and the balanced signal path for isolating the noise of the input signal to be amplified is not required, thereby simplifying the constitution of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.