Figure 6-16.—Method for applying an external field to thin film elements.
. Word line pair
l Sense/digit line
. Film array
l Ground plane
l Keeper
l Insulators
An example of one packet is shown in figure 6-17.
Word Line Pair.— A current generated along the
word line produces a transverse field. This magnetizes
the film element. This causes the magnetic field to align
with the word line and causes a current in the sense/digit
line. This resulting current in the sense/digit line is read
as a zero or a one by the register at the end of the
sense/digit line.
Sense/Digit Line.— A current generated along the
sense/digit line produces a longitudinal field in one of
two directions to each film element. The longitudinal
field is required in addition to the transverse field to
assure proper writing into a thin film memory. The
direction of the cell induced film signal on the
sense/digit line determines whether a one or a zero will
be written into memory.
Figure 6-17.—One thin film packet.
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