Integrierter Verstärker zum Ansteuern von akustischen Wandlern

Details

Veröffentlichungs-Nr.

EP2418768

Aktenzeichen

EP10172369

Anmeldetag

10. August 2010

Veröffentlichung

24. April 2013

Erteilung

24. April 2013

Rechtsraum

EP

IPC

H03F1/30H03F3/187H03F3/213H03F3/45H03H11/12H03F1/34

Abstract

The invention relates to an electronic integrated amplifier (100; 200) for driving an acoustic transducer. The amplifier comprises two differential input terminals (10, 11; 20, 21) to receive an input signal (Vin) and a first (12; 22) and a second (GND; 23) output terminal to provide an output signal (Vout) to the transducer. In addition, the amplifier comprises an operational amplifier (OA; OA') having an input end (IN) including differential inputs and an output end (OUT) operatively associated with the first (12; 22) and second (GND; 23) output terminals. A pair of input resistors (R1) connect the two differential input terminals to two (14, 15; 24, 25) intermediate terminals, respectively. A pair of feedback resistors (R2) connect the first (12; 22) and second (GND; 23) output terminals to the two intermediate terminals, respectively. The integrated amplifier also comprises means (C 1 , C 2 , Csw 1 , Csw 2 ) for high-pass filtering the input signal (Vin). Such filtering means is characterized in that it comprises an input element (C 1 , C 2 ) interposed between said intermediate terminals and the input end (IN) of the operational amplifier (OA; OA'), and a feedback element (Csw 1 , Csw 2 ) connected between the input end (IN) and the output end (OUT) of the same operational amplifier (OA; OA').

Anmelder

Firma

ST-Ericsson SA

Land

🇨🇭 Schweiz

Fachgebiete