Magnetic encoder with high resolution of data signal recording a

Details Magnetic encoder with high resolution of data signal recording a Magnetic encoder with high resolution of data signal recording a

1990-04-04

1991-07-30

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

235449, 32420722, 32420723, 338 32R, 360113, G01B 714, G01B 700, G06K 708, G11B 539

Patent

active

050362763

ABSTRACT:
A magnetic encoder comprises a sensor having a plurality of magnetoresistive (MR) elements placed in juxtaposed position relative to a magnetic recording medium upon which data signals are recorded employing a recording pitch, A. Output signals produced by the MR elements connected in a plurality of bridge circuits are formed by relative movement between the MR elements and the magnetic recording medium. The MR elements are positioned at A
intervals, wherein n is an integer and n.gtoreq.8. A multiplier circuit is connected to receive the output signals from the MR element bridge circuits and provide a plurality of phase shifted output signals corresponding to a A/N pitch interval of recording pitch, A, wherein N is an integer and N.gtoreq.2.

REFERENCES:
patent: 4594548 (1986-06-01), Takahashi et al.
patent: 4818939 (1989-04-01), Takahashi et al.

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