read head


Also found in: Dictionary.

read head

[′rēd ‚hed]
(computer science)
A device that converts digital information stored on a magnetic tape, drum, or disk into electrical signals usable by the computer arithmetic unit.
References in periodicals archive ?
However, the depth of the magnetic layer does affect the strength of the recorded signal, requiring more sensitive read heads and a higher tolerance to noise levels.
These technologies in combination with a 90nm wide GMR read head enable the use of a track width of 177nm.
Ian Read head, Deputy Chief Constable of Hampshire Police, said he did not want to live in a country with surveillance on every street corner.
The data capacity of a computer's magnetic hard drive depends largely on the sensitivity of a detector, or read head, that's used to decipher its contents.
In disk drives, the relaxation rate is important for high data rate operation of the read head and for writing, both in the writer and in the media.
However, the company revealed that its demonstration involved an advanced version of its giant magneto-resistive read head, a narrow-track thin-film inductive write head, ultra-low noise cobalt-alloy magnetic media and advanced partial-response, maximum likelihood (PRML) channel electronics.
OMR Scanner Machine, Branded & complies with the following specifications: scanning capacity of 2,800 sheets per hour, Dual sided Read head reads both sides in one pass, single output tray 100 sheets capacity, Automatic Input hopper
In addition to accepting PIN debit, Pentagon uses 3DES to encrypt the magnetic stripe right at the read head.
As the read head follows immediately behind the write head, there is no way for the drive to detect the problem as it happens.
Parkin, a pioneer in the science and application of spintronic materials, invented the spin-valve read head in 1989 at IBM Research and later transformed this scientific achievement into a practical and cost-efficient data storage technology at the heart of every computing device.
Point-of-sale (POS) encryption occurs entirely within the Tamper Resistant Security Module of the payment device or at the encrypting read head and no decryption occurs until the transaction is within the RBS WorldPay host environment.
In particular, measurements of thin-film properties critical to the development of read head sensors and magnetic recording media are being investigated.