Appeal No. 2000-1939
Application 08/791,281
capacitance from said switch common terminal to said
reference level and a nonlinear conduction resistance
from said first switch terminal to said switch common
terminal when said switch control couples said first
switch terminal to said switch common terminal, said
nonlinear parasitic capacitance and said nonlinear
conduction resistance forming a nonlinear impedance
from said switch common terminal to said reference
level; and
a compensation capacitance coupled from said switch
common terminal to said reference level to linearize said
nonlinear impedance from said switch common terminal to said
reference level, wherein said compensation capacitance has a
capacitance value larger than said parasitic capacitance and
an impedance lower than said conduction resistance at said
predetermined switching rate.
The rejection
The rejection is based on the admitted prior art circuit
shown in Appellants' Figure 1 in view of the following U.S.
Patent:
Gregorian et al. (Gregorian) 4,393,351 July 12, 1983
All of the appealed claims stand rejected under 35 U.S.C.
§ 103 for obviousness over the admitted prior art in view of
Gregorian.
The merits of the rejection
Gregorian's Figure 3, reproduced below, shows an integrator
in which one and only one terminal of a feedback capacitor 23 is
-7-
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