Amplifier circuitry
US8203382B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 2010 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A class D amplification device that prevents beats caused by switching operations of a switching power supply and a class D amplifier from causing noise within a voice band, enables easy control over power supply operations, and offers low power loss is provided. The amplification device includes a unit that generates a reference clock, a switching power supply that operates at a first frequency at which the frequency of the reference clock is divided, and a triangular wave generation unit that operates at a second frequency higher than the first frequency at which the frequency of the reference clock is divided. The amplification device further includes a class D amplifier that performs a switching operation with a pulse whose width has been modulated according to the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.