Voltage mode amplifier for use with a high Q magnetic head

Details Voltage mode amplifier for use with a high Q magnetic head Voltage mode amplifier for use with a high Q magnetic head

1976-10-01

1979-01-09

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 65, G11B 502, G11B 545

Patent

active

041341406

ABSTRACT:
A high Q magnetic playback head applies its developed signal to the input of a voltage mode circuit. To facilitate equalizer design, the head is resistor-damped. While mere resistor damping reduces the Q of the head, it does so at the expense of the signal-to-noise ratio (SNR) of the head-and-amplifier circuit. To maintain SNR substantially without change, the amplifier employs a large resistance to which negative feedback is applied so the resistance appears as an effective resistance equal to its actual value divided by the amplifier gain. The value of this effective resistance is made to equal the magnetic playback head inductive reactance at the point of resonance, thereby reducing the head Q to approximately 1, and equalizer design is made easier.

REFERENCES:
patent: 2697756 (1954-12-01), Bessire
patent: 3026380 (1962-03-01), Reher et al.
patent: 3048664 (1962-08-01), Drukey
patent: 3068327 (1962-12-01), Davidson
patent: 3160824 (1964-12-01), Stair
patent: 3310637 (1967-03-01), Skov
patent: 3513267 (1970-05-01), Trost
patent: 4041538 (1977-08-01), Parker
Electronic Designer's Handbook by Landee et al., Sec. 18.1 & 18.2, McGraw-Hill Book Co., Inc. .COPYRGT.1957.

Affiliated with

Also associated with

Rating

Voltage mode amplifier for use with a high Q magnetic head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voltage mode amplifier for use with a high Q magnetic head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage mode amplifier for use with a high Q magnetic head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1791083