Circuit for use with a loudspeaker for portable equipments
US9288574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Mar 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45418
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to a circuit (100) for use with a loudspeaker (104) having a first differential input terminal (t1) and a second differential input terminal (t2), the circuit (100) comprising: a differential power amplifier (103) having a first differential output terminal (t3) operatively connected to the first differential input terminal (t1) of the loudspeaker (104) and a second differential output terminal (t4) operatively connected to the second differential input terminal (t2) of the loudspeaker (104);—a first resistor (RS1) disposed between the first differential output terminal (t3) of the differential power amplifier (103) and the first differential input terminal (t1) of the loudspeaker (104); a second resistor (RS2) disposed between the second differential output terminal (t4) of the differential power amplifier (103) and the second differential input terminal (t2) of the loudspeaker (104). The circuit (100) further comprises: a first resistive module (RR1, RR2) arranged to generate on a respective output terminal (t5) a first control voltage (VIN), the first resistive module (RR1, RR2) having a first input terminal (t6) connected to the first differential output t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.