EP 1839378 A2 20071003 - METHOD AND TOPOLOGY TO SWITCH AN OUTPUT STAGE IN A CLASS AB AUDIO AMPLIFIER FOR WIRELESS APPLICATIONS
Title (en)
METHOD AND TOPOLOGY TO SWITCH AN OUTPUT STAGE IN A CLASS AB AUDIO AMPLIFIER FOR WIRELESS APPLICATIONS
Title (de)
VERFAHREN UND TOPOLOGIE ZUM SCHALTEN EINER AUSGANGSSTUFE IN EINEM KLASSE-AB-AUDIOVERSTÄRKER FÜR DRAHTLOSE ANWENDUNGEN
Title (fr)
PROCEDE ET TOPOLOGIE PERMETTANT DE COMMUTER UN ETAGE DE SORTIE DANS UN AMPLIFICATEUR AUDIO DE CLASSE AB DESTINES A DES APPLICATIONS SANS FIL
Publication
Application
Priority
- US 2005045312 W 20051215
- FR 0500506 A 20050118
- US 10941005 A 20050419
Abstract (en)
[origin: WO2006078378A2] A circuit (100) and method of switching an output of a single preamplifier (110) to or from multiple amplifier output stages (150, 151). The preamplifier output is switched between multiple audio amplifier output stages without degrading the performance of the output signal. A switching circuit (210-213, 220-223) selectively couples the preamplifier output to an amplifier output stage and also couples (160, 161) a feedback loop (122, 123) between the selected amplifier output stage and the preamplifier stage.
IPC 8 full level
H02B 1/00 (2006.01); H03F 21/00 (2006.01); H03F 99/00 (2009.01)
CPC (source: EP)
H03F 3/181 (2013.01); H03F 3/45475 (2013.01); H03F 3/68 (2013.01); H03F 3/72 (2013.01); H03F 2200/03 (2013.01); H03F 2203/45534 (2013.01); H03F 2203/7215 (2013.01)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 2006078378 A2 20060727; WO 2006078378 A3 20061116; EP 1839378 A2 20071003; EP 1839378 A4 20090114
DOCDB simple family (application)
US 2005045312 W 20051215; EP 05854097 A 20051215