Amplifying circuit for magnetic record and playback apparatus ha

Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of the amplifier

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G11B 502

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active

058525270

ABSTRACT:
A DC feed-back circuit for causing a DC voltage of an external transistor in which an output bias current of a record amplifier flows to be equal to a DC voltage of an output terminal is provided so as to decrease power consumption. Thus, a plurality of record amplifying circuits can be incorporated into one IC chip. In particular, in home-use Hi-Fi VCRs, a Hi-Fi record amplifying circuit and video record amplifying circuits can be incorporated into one chip.

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