Bubble Sensor for Multiplex Applications
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
The domain structure in a thin-film magnetoresistive sensor for bubble detection is influenced by the geometry of the pads which allow electrical connection to be made to the sensor element. In order to achieve a symmetrical response to a rotating drive field, the sensor geometry should be symmetrical, particularly for multiplex applications. A possible solution is to design sensor elements with pads located at the ends of the sensor strip. The disadvantage is that the presence of a bubble expansion conductor usually requires that the overall length of the sensor be greater (and hence have higher resistance and lower sensitivity) than that of the equivalent sensor with electrical connection made to the side.