Appeal No. 1998-0750
Application 08/232,135
amplifier 1 is higher than the voltage V on the output line 9,
OUT
the first output transistor 2 is turned on so that a charge
current flows from first output transistor 2 to the output line 9.
As a result, the voltage V is raised till it equals a voltage VOUT IN
input to the non-inverted terminal of the differential amplifier
1. In this period, the transistors 10, 11 and 12 remain off.
When the voltage V is lower than the voltage V , a drainG OUT
current flows from the transistor 10 so that the drain voltage of
the transistor 10 controls the gate of the output control
transistor 11. This causes a drain current to flow from the output
control
transistor 11, thereby the second output transistor 12 is turned
on to flow a discharge current. As a result, the voltage V is
OUT
reduced till it equals the voltage V .
IN
Kumar discloses a matrix-addressed diode flat panel display
of the field emission type. In Figure 1, Kumar discloses
apparatus for addressing the panel display.
Opinion
We will sustain the rejection of independent claim 4, and
claims 61-63 which depend therefrom, as obvious over Kanayama.
Appellants argue that the claim 4 requirements that
5
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