Appeal No. 97-3918
Application 08/447,901
is before us in this appeal. That technique, embodied in the3
playback circuit of appellants' Figure 5, employs a variable
gain gm amplifier 24A (Spec. at 16:11-16), the gain of which
is switched to a "high gm state during the time intervals T1
and T2 shown in Fig. 9D" (Spec. at 19:16-19), when the power
source is turned on and also when head switching occurs (Spec.
at 18:24 to 19:2). We note that Figure 9(D) is labeled
"SECOND gm AMPLIFIER" because Figure 9 is used to illustrate
the operation of each of the four playback circuits shown in
Figures 5-8 (Spec. at 17:18 to 18:3), of which Figure 6
employs two gm amplifiers 24 and 41 (Spec. at 16:17-20). The
examiner is therefore incorrect to state that Figure 9 does
not depict the invention of Figure 5 (Answer at 3).
Claim 2, the only independent claim on appeal, reads on
Figure 5 as follows:
3Application Serial No. 08/264,473, involved in Appeal
No. 95-0517, claims another of these techniques.
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