Amplifier circuit
US7068095B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2005 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Jan 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45078
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention is directed to an amplifier circuit based on the principle of a class D amplifier. To avoid unwanted convolution effects and to improve the power supply rejection ratio, provision is made for the amplitude of the ramp signal used for pulse width modulation to track proportionally the supply voltage for the amplifier circuit. For this purpose, the ramp signal generator has an amplitude control input suitably connected to supply and reference potentials. This ensures a constant duty ratio which is independent of the supply voltage. The present circuit may be used, for example, as a DC/DC converter or as an audio amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.