Power amplifier
US6671329B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifier, particularly a gradient amplifier of a magnetic resonance tomography apparatus, has at least one switched output stage containing a power bridge circuit formed by a number of switch elements and connected to a floating intermediate circuit voltage, as well as at least one digital pulse width modulator that generates pulse-width-modulated control signals for all switch elements from a digital input signal in order to generate at least one output stage voltage according to an output stage switch clock. The digital pulse width modulator is preceded by a pre-modulator for forming the digital input signals, with at least one of the digital input signals containing an offset, preferably corresponding to half an LBS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.