Appeal No. 1997-0058
Application No. 08/300,399
occurs during switching. In particular, the circuit imposes a
maximum on the slew rate (or slope) of the current sense
signal. Claim 1 is illustrative of the claimed invention and
reads as follows:
1. A circuit comprising:
an amplifier having a controlled maximum slew rate,
connected for receiving a current sense signal including a
meaningful portion proportional to a current in a switched
power device and a current spike portion and for generating an
output, the maximum slew rate of said amplifier being set so
as to attenuate the current spike portion without attenuating
the meaningful portion of the current sense signal; and
a switching regulator controller connected to receive
the output of said amplifier and to control the switched power
device.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
White 4,928,220 May 22,
1990
Kusano 5,192,884 Mar. 09,
1993
Sasaki et al. (Sasaki) 5,382,838 Jan. 17,
1995
(filed Mar. 18, 1993)
Claims 1 and 6 stand rejected under 35 U.S.C. § 102(b) as
being unpatentable over White.
Claims 2, 5, 13, 16, and 17 stand rejected under 35
U.S.C.
2
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