Low noise magnetic transducer preamplifier having flat response

Details Low noise magnetic transducer preamplifier having flat response Low noise magnetic transducer preamplifier having flat response

1976-04-12

1977-08-09

Lucas, Jay P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 66, G11B 502

Patent

active

040415384

ABSTRACT:
A playback preamplifier for use on a recording machine utilizing a magnetic recording medium to provide a substantially flat response between a general range of 200 to 6000 Hz. and having a substantially improved signal-to-noise ratio. The circuit includes a three stage amplifier having an overall DC feedback loop. The magnetic transducer is connected in the feedback loop so that the DC feedback current biases the transducer with the DC feedback current.

REFERENCES:
patent: 3027549 (1962-03-01), Allen
patent: 3530257 (1970-09-01), Brown
patent: 3564160 (1971-02-01), Temes
patent: 3666893 (1972-05-01), Fujiwara
patent: 3683131 (1972-08-01), Hodder
patent: 3838452 (1974-09-01), Royce
Transistor Tape Preamplifier - Wireless World, 12/58, p. 572, "Use of Head Inductance in a Feedback Circuit", Ridler.

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