High frequency switch-mode power amplifier
US6882219B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2001 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | May 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/2178
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switch-mode power amplifier circuit using high power, low distortion waveforms is connected to an electromagnetic load to provide a high degree of control over the load. The circuit comprising a plurality of half-bridge networks having outputs combined at a summation point. The half-bridge networks are switched to provide power outputs sequenced to generate an interlaced output at the summation point which is operably connected to the load so that for a given switching frequency of the networks the operational frequency of the circuit is increased. The sequencing of the half-bridge outputs to generate an interlaced output facilitates the reduction of the switching frequency of individual switching components within the half-bridges while at least maintaining the overall operational frequency of the circuit. For N half-bridges operating at ƒkHz, the overall operational frequency of the circuit is NƒkHz. Alternatively, the switching frequency of individual switching elements of a system operating at ƒokHz may be reduced by a factor of N. A feedback signal generated across the load is included at the summation point and is optionally augmented to decrease distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.