Appeal No. 96-1844
Application No. 08/125,396
supplies an operating power source voltage to the digital
circuit.
In Figures 1 and 2 of Fujita, the substrate (10) (or
semiconductor body) and the inner well (16) of the digital
circuit region are connected to the same low potential power
supply wiring (42 in Figure 1, 42A in Figure 2). (See also
Fujita translation, page 7, lines 10-13 and page 8, line 26-
page 9, line 2). In Figure 3, substrate (10) is connected to
VCC2 by power supply line (42B) which biases inner well (16)
of the digital circuit region. (See also Fujita translation,
page 9, line 25-page 10, line 9). Accordingly, in all
embodiments, the semiconductor body bias means is neither
independent nor different from the bias means for the third
well nor derived from a power source different from that of
the digital circuit.
The examiner states (Answer, page 3) that Fujita does not
teach separate power supplies for different wells. The
examiner turns to Jarrett, asserting that "Jarrett teaches
applications for ADC's and DAC's wherein . . . particularly in
column 5 lines
Page 5
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Last modified: November 3, 2007