Audio amplifier system with discrete digital frequency selective damping factor controls
US6400221B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2001 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Jun 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3264
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An audio amplifier drives a load in the form of a sound producing loud speaker exhibiting a frequency variable impedance characteristic over a range of audio frequencies. Voltage and current feedback circuits respectively establish a minimum voltage feedback and a discrete feedback characteristic. A presence feedback circuit coupled to ground reduces feedback in discrete steps with increasing frequency above a selected level and a resonance feedback circuit coupled in parallel with the amplifier circuit coupled in parallel with the amplifier reduces voltage feedback in discrete steps with decreasing frequencies below a selected level. The controls are responsive to a digital interface for providing discrete settings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.