Positive feedback low input capacitance differential amplifier

Details Positive feedback low input capacitance differential amplifier Positive feedback low input capacitance differential amplifier

1993-03-30

1994-09-06

Shepperd, John

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

330254, 330260, 330311, G11B 502, H03F 345, H03F 304, H03F 368

Patent

active

053453468

ABSTRACT:
A read preamplifier for use in reading data in a magnetic storage system uses positive feedback to reduce the preamplifier's input capacitance. The read preamplifier includes first and second voltage supply terminals. An input is coupled to the second voltage supply terminal and receives input signals from a connected magnetic head. An output is coupled to the first voltage supply terminal and to the input for producing output signals based upon the input signals. A positive feedback circuit, coupled to the input reduces the input capacitance of the read preamplifier.

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patent: 5239210 (1993-08-01), Scott
patent: 5257146 (1993-10-01), Price et al.

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