Appeal No. 1997-3956
Application 08/583,960
teaches a third voltage dividing element which includes one
compacitor string and a resistor string wherein the resistor
string has a high resistance sufficient to avoid influencing
the determining region of second voltage providing element.
Appellants argue that this suppresses a direct current flow
into the third voltage-dividing element thereby avoiding
influencing of the reference voltage.
The Examiner states on page 4 that Yahagi discloses a
three stage ADC in Figure 7. The Examiner further states that
the first reference voltage generator is shared by the upper
string and medium stage. A second reference voltage generator
supplies the lower stage with the particular step level as
determined by the medium encoder output. The Examiner admits
that Yahagi does not disclose the makeup of the reference
voltage generators as claimed by Appellant. Examiner argues
that resistive or capacitive dividers can be interchangeably
used as taught by Yamada.
As we pointed out above we fail to find any evidence in
Yamada of a teaching or suggestion of providing Appellant's
claimed upper comparison voltage generating means for dividing
a reference voltage, no comparison voltage generating means
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