Patent ID: 9288574
Filing Date: 2016-03-15
CPC Classification: H03F,H04R

Claim Text:
1. A circuit for use with a loudspeaker having a first differential input terminal and a second differential input terminal, the circuit comprising: a differential power amplifier having a first differential output terminal operatively connected to the first differential input terminal of the loudspeaker and a second differential output terminal operatively connected to the second differential input terminal of the loudspeaker; a first resistor disposed between the first differential output terminal of the differential power amplifier and the first differential input terminal of the loudspeaker; a second resistor disposed between the second differential output terminal of the differential power amplifier and the second differential input terminal of the loudspeaker, the circuit wherein it further comprises: a first resistive module arranged to generate on a respective output terminal a first control voltage, the first resistive module having a first input terminal connected to the first differential output terminal of the power amplifier and a second input terminal connected to the second differential input terminal of the loudspeaker, a second resistive module arranged to generate on a respective output terminal a second control voltage, the second resistive module having a first input terminal connected to the second differential output terminal of the power amplifier and a second input terminal connected to the first differential input terminal of the loudspeaker, the circuit being arranged to control the differential power amplifier on the basis of the first control voltage and the second control voltage.