Appeal No. 2003-0312
Application No. 08/871,199 Page 9
barrier can have two values, V0 and V1. When the height has the
value V1, charges that exceed V1 are collected by the drain.
when the height has the value V0, all of the charges contained in
circuit Di flow into the drain. In normal operation, the
potential of circuit Di is below V1, such that Ei plays the role
of a changeover switch. When the potential of circuit Di is
greater than V1, i.e., a high amplitude signal is received, the
charges overflow into the drain. When the potential of circuit
Di exceeds V1, the height of the barrier is lowered to V0 by the
inverter Q. The result is that, outside normal operation,
barrier Ei is opened, switch N is closed, emptying Di.
We find from the disclosure of Fouilloy that under normal
operation, the barrier Ei is set to V1, and that all charges in
Di below the potential of V1 are accumulated. We further find
that if the potential of circuit exceeds V1, that excess charges
are collected by the drain. Thus, we find that in Fouilloy,
during normal operation charges below the threshold V1 are stored
and charges in excess of V1 go to drain, which is opposite to the
operation of the circuit defined in appellants' claim 61. We
additionally find that outside of normal operation, i.e., when
the sensors are being dazzled, that the height of the barrier is
lowered to V0, and all charges in Di go to drain. In an attempt
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