Appeal No. 97-3918
Application 08/447,901
2. A recording/reproducing apparatus for a magneto-
resistive head operative in recording and reproducing
modes, comprising
an initial-stage amplifying means [22] for
amplifying an output signal from a magneto-resistive head
[MR HEAD],
a variable gain type voltage-to-current converting
amplifier [24A] for amplifying a differential signal
between an output signal of said initial-stage amplifying
means and a reference voltage [Vref1],
feedback means for feeding back a dc component of an
output signal from said voltage-to-current converting
amplifying means [24A] to an input side of said initial-[4]
stage amplifying means via a low pass filter [which is
formed by the transconductance gm of amplifier 24A and
the capacitance of capacitor 26 ], and 5
means [not shown] for selectively adjusting the gain
of said variable gain amplifier at predetermined times
relative to the initiation of a recording mode and to the
initiation of a reproducing mode [see Fig. 9(D)].
Claim 2 reads in a similar manner on the alternative
playback circuit of Figure 7.
A. The written description support issue
4The antecedent for "voltage-to-current converting
amplifying means" presumably is the previously recited
"voltage-to-current converting amplifier" (emphasis added).
The claim should be amended to remove this inconsistency.
5Spec. at 3:9-12.
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