Position transmitter with at least one magnetoresistive...

Details Position transmitter with at least one magnetoresistive... Position transmitter with at least one magnetoresistive...

2006-06-13

2006-06-13

Patidar, Jay M. (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207250

Reexamination Certificate

active

07061232

ABSTRACT:
A position transmitter includes at least one magnetoresistive sensor and an associated magnetic multipole wheel having a large number of uniformly arranged pole pairs (2). The at least one sensor comprises first, second third, and fourth magnetoresistive resistors that are electrically connected as a Wheatstone bridge with four half bridges, with a voltage UO being fed in one bridge diagonal and a sinusoidal or cosinusoidal signal being produced on the other diagonal. A distance (d) between the first and second or third and fourth resistors located paral el to one another is selected with reference to a scanning direction of the multipole wheel, such that it is not equal the wavelength of a pole pair. A distance between the first and second resistors and between the third and fourth resistors is the same.

REFERENCES:
patent: 4818939 (1989-04-01), Takahashi
patent: 5430375 (1995-07-01), Inoue
patent: 5680042 (1997-10-01), Griffen et al.
patent: 5930905 (1999-08-01), Zabler et al.
patent: 6300758 (2001-10-01), Griffen et al.
patent: 195 06 938 (1996-08-01), None

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