Appeal No. 1998-2508
Application 08/626,299
supplied to a zero cross detector 19 and to a level sensor 20.
See column 4, lines 39 through 41. Kimura further discloses
that the zero cross detector 19 produces a zero cross signal
shown in fig. 4E and a sawtooth signal generator 21 is
triggered at a raising edge of the zero cross signal to
produce a sawtooth signal illustrated in fig. 4F. See column
4, lines 42 through 46. Kimura further discloses that the
sawtooth voltage signal is
applied to a phase comparator 22 such that the instantaneous
value of the sawtooth voltage signal is sampled and held and
then stored in a voltage memory circuit 23. See column 4,
lines 46 through 57.
Kimura further emphasizes that fig. 5 shows the
embodiment of the voltage memory circuit 23. See column 5,
lines 14 through 31. Kimura discloses that switch 23-1 is
actuated by an output signal from level sensor 20 and the
integrating circuit consists of resistor 23-2 and a capacitor
23-3. The level sensor 20 compares the output signal from
the band pass filter 14 with a given standard level and the
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