High efficiency power amplifying apparatus
US6091292A · kind A · utility
14Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/0222
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A parallel, synchronously driven linear power amplifier (6) and class D power amplifier (2) form an equivalent active filter, minimizing the scale of the passive filter (3), and effectively suppressing high frequency noise. First to third muting circuits (17-19) are used when the power supply is turned on and off to interrupt signal supply from the signal input terminal, and control operation of the class D power amplifier (2) and linear voltage amplifier (15), thereby preventing extraneous irritating noises such as popping sounds from a loudspeaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.