Hearing aid with an end stage that operates in switching mode

Details Hearing aid with an end stage that operates in switching mode Hearing aid with an end stage that operates in switching mode

H - Electricity

04

R

H04R 25/00 (2006.01) H03F 3/217 (2006.01)

Patent

CA 2063512

20365-3159 91 P3138 E Abstract In a hearing aid with an amplifier and with a push-pull end stage (6), which operates in switching mode and switches an earpiece (15) in an output circuit (19) with an ultrasonic frequency as a time function from an acoustic signal, it is intended to make it possible to influence the frequency response of the earpiece that is connected by a condensor that is connected in parallel to this. To this end, the end stage incorporates at least one decoupling means (28, 29; 34; 38), through which an electrical signal that is dependent on the switched state of the earpiece (15) can be tapped off and acts through at least one feedback path (22 to 27; 35, 36, 26, 27) on the end stage (6) so as to increase the impedance of the output circuit (19). Figure 1.

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