The circuit diagram of a high frequency bias magnetic amplifier used by earphones

Published:2011/7/13 19:50:00 Author:leo | Keyword: Bias magnetic amplifier, high frequency | From:SeekIC

The picture 1 shows a high frequency bias magnetic amplifier used by earphones. Its resistance is 30 to 100 Ω, so it takes TC28 as the driver to meet the need, whose resistance is 6Ω. In TC28, four simple negaterG1 to G4 make up of a full bridge circuit. This bridge circuit is used to drive the left and right audio channel of the earphones. TL451 is the integrated controller of switch power resourcing. During simulating, if the left and right audio channels output signals with different frequency, the frequency difference will be added to output signals as the deadbeat signals.



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