Amplifier and a method for detecting the presence of a load

Details Amplifier and a method for detecting the presence of a load Amplifier and a method for detecting the presence of a load

1997-07-09

1999-05-18

Pascal, Robert

Amplifiers

Combined with automatic amplifier disabling switch means

330146, H03F1/14

Patent

active

059054085

ABSTRACT:
An amplifier and a method for detecting the presence of a load (3) in a bridge-type amplifier configuration, in which the amplifier includes two amplifying circuits (1, 2). A load detection sequence is combined with an activation sequence of the amplifier by providing, during activation of the first amplifying circuit (1), a low impedance (4) at the output (203) of the second amplifying circuit (2), and determining whether a current flows through the low impedance (4) or one of the outputs (103, 203) of the amplifying circuits (1, 2) during the activation of the first amplifying circuit (1).

REFERENCES:
patent: 3990020 (1976-11-01), Porter, III
patent: 4330756 (1982-05-01), Moreau
patent: 5101170 (1992-03-01), Torazzina et al.
patent: 5708390 (1998-01-01), Dunnebacke

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