Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1992-10-28
1996-01-09
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
Magnetometers
324235, 32420721, 338 32R, 327510, G01R 3306, G01B 714, H03K 1790, H03K 1918
Patent
active
054831628
ABSTRACT:
A magnetic detector, such as is used in a frequency generator, for detecting the rotational rate of a motor includes magnetic resistance elements and an operational amplifier. The magnetic resistance elements have a predetermined resistance ratio and are connected serially between a power source and ground. The common node between the two magnetic resistance elements serves as an output terminal for providing an output voltage. The output voltage from the output terminal being supplied to one of the two input terminals of the amplifier. The voltage from a resistance voltage divider disposed between the power source and ground is supplied to the other input terminal of the amplifier. A change of the resistance ratio between the two magnetic resistance elements is effected by a resistor disposed in series with the elements or in parallel with one of the elements. This change serves to equalize the DC component of the output voltage and the divided voltage and, consequently, common mode noise level effects of the power source are substantially eliminated.
REFERENCES:
patent: 3979775 (1976-09-01), Schwarz
patent: 4075671 (1978-02-01), Cheatham et al.
patent: 4649342 (1987-03-01), Nakamura
patent: 4806860 (1989-02-01), Iijima et al.
patent: 4914387 (1990-04-01), Santos
patent: 5243280 (1993-09-01), Kusumi
Naito Hayato
Ushikoshi Isao
Edmonds Warren S.
O'Shea Sandra L.
Sankyo Saiki Mfg. Co., Ltd.
LandOfFree
Magnetic detector for a frequency generator responsive to motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic detector for a frequency generator responsive to motor , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic detector for a frequency generator responsive to motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1304820