Stanford Research Systems SIM983, Руководство по эксплуатации и обслуживанию

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4.2 Verifying AC Performance 4 – 5
top end of the range for BWTH
=
1
. According to the discussion in
Section 5.1.2.5, the amplifier is relatively overcompensated, result-
ing in an increased settling time. Compare with Figure 4.3, with
G
=
10
.
00 at the low end of the range for BWTH
=
3
. The amplifier is
relatively undercompensated, and the smaller phase margin results
in some overshoot and ringing.
TDS 3034 28 Apr 2006 11:38:08
Figure 4.1: Response of the SIM983 to a 1.0 V
peak-peak step,
G
= +
1
.
00
,
V
ofs
=
0
.
000 V.
TDS 3034 28 Apr 2006 11:39:28
Figure 4.2: Response of the SIM983 to a 1.0 V
peak-peak step,
G
= +
4
.
00
,
V
ofs
=
0
.
000 V.
TDS 3034 28 Apr 2006 11:40:44
Figure 4.3: Response of the SIM983 to a 1.0 V
peak-peak step,
G
= +
10
.
00
,
V
ofs
=
0
.
000 V.
TDS 3034 28 Apr 2006 11:41:34
Figure 4.4: Response of the SIM983 to a 1.0 V
peak-peak step,
G
= +
19
.
99
,
V
ofs
=
0
.
000 V.
The asymmetrical positive-going and negative-going responses
in Figures 4.5 and 4.6 are ultimate artifacts of the single-ended,
as opposed to di
ff
erential, topology of the input voltage bu
ff
er
(Section 5.1.2.1).
SIM983 Scaling Amplifier