Title :
Spectrum analysis of base-line-popping noise in MR heads
Author_Institution :
Headway Technol. Inc., Milpitas, CA, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
Characteristics of base-line-popping (BLP) noise in MR heads are described. A simple mathematical model describing the BLP noise spectrum is presented. In this model, random-telegraph-like noise is used to approximate BLP noise. The correlation function and noise spectrum density are derived analytically for a special case. The calculated noise spectrum is in good agreement with experimental data. “Excessive noise” in the low frequencies are found to be the general signature of BLP noise for shielded MR heads
Keywords :
magnetic heads; magnetic recording noise; magnetoresistive devices; random noise; spectral analysis; BLP noise spectrum; MR heads; base-line-popping noise; correlation function; excessive noise; low frequency noise; mathematical model; noise spectrum density; random-telegraph-like noise; shielded MR heads; spectrum analysis; Autocorrelation; Magnetic field measurement; Magnetic heads; Magnetic noise; Magnetic sensors; Noise level; Pulse measurements; Sensor phenomena and characterization; Telegraphy; Yttrium;
Journal_Title :
Magnetics, IEEE Transactions on
