Appeal No. 1996-2199
Application 08/191,060
We agree with the examiner that the invention as
recited in claim 1 does not require that a hysteresis
relationship exist between temperature and frequency. Using
the language of claim 1 and Figure 5 of Ohi, we read claim 1
on Ohi as follows: the first frequency is 30 Khz, the second
frequency is 20 Khz (for example), the first temperature is
70 C (corresponding to the 20 Khz frequency), and the secondo
temperature is 40 C (corresponding to the 30 Khz frequency).o
With these assigned values for the two frequencies and the
threshold temperatures, we find that the temperature measuring
circuit of claim 1 is met by the operation of the Ohi circuit.
We note that Ohi’s flow charts in Figures 3 and 4 indicate
that the Ohi control process is a continuous process which
continuously adjusts frequency as a function of temperature
regardless of the direction in which the temperature might be
changing.
Although we agree with the examiner that claim 1 does
not require a hysteresis relationship between temperature and
frequency, claim 7 specifically recites that the comparator
have a hysteresis characteristic between the first and second
7
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