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參數(shù)資料
| 型號： | AB-020 |
| 英文描述： | AB-020 - BURR-BROWN SPICE BASED MACROMODELS. REV. F |
| 中文描述： | 抗體- 020 - Burr - Brown公司基于的SPICE宏模型?；?。 F |
| 文件頁數(shù)： | 9/42頁 |
| 文件大小： | 606K |
| 代理商： | AB-020 |
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inverting inputs of the amplifiers. The voltage noise is
modelled using D
N1
, D
N2
, V
N1
and V
N2
to create the noise
source and EN to model the noise on the non-inverting input
of the amplifiers.
Input Capacitance
Differential and common-mode input capacitors, C
, C
,
and C
have been added to the enhanced macromodels.
Input capacitance could also be modeled by including ca-
pacitor coefficients in the transistor models. Instead, discrete
capacitors were used so the comparison to the standard
model would be more obvious.
FIGURE B2. P-Channel JFET-Input Op Amp Enhanced PSpice Parts Macromodel.
FIGURE B3. NPN-Input Op Amp Enhanced PSpice Parts Macromodel.
+In
+
V+
V
O
V–
R
C1
R
C2
C
1
Q
2
Q
1
–In
1
2
R
Q
D
P
V
C
D
C
+
V
E
D
E
4
5
3
53
54
G
CM
G
A
R
2
C
2
6
9
+
V
B
R
O1
+
E
GND
F
B
7
+
V
LIM
8
R
O2
R
EE
C
EE
99
I
EE
10
11
12
D
LN
D
LP
+
+
91
92
V
LN
V
LP
+
H
LIM
90
D
Q1
+
+
21
22
V
Q1
F
Q3
20
F
Q2
F
Q1
R
E1
R
E2
C
DIF
C
2CM
C
1CM
D
Q2
V
Q2
13
14
See Table II, for a more detailed
description of the components.
See Table II, for a more detailed
description of the components.
Input Protection Diodes
If an op amp contains input protection diodes, its enhanced
op amp macromodel also contains diodes connected be-
tween the input pins as shown in Figures B5 and B6, for
example.
Quiescent Power
R
was replaced by R
. The value of R
is higher. It models
only the resistive portion of quiescent current. The current
sources described below model the constant portion of the
quiescent current. This technique provides a more accurate
model of quiescent current vs power-supply voltage.
C
DIF
–In
+
V
O
V–
R
D1
R
D2
J
2
J
1
+In
2
1
R
Q
D
P
V
C
D
C
+
V
E
D
E
4
5
3
53
54
G
CM
G
A
R
2
C
2
6
+
V
B
R
O1
F
B
7
+
V
LIM
8
R
O2
R
SS
C
SS
99
I
SS
10
C
1
11
12
D
LN
D
LP
+
+
91
92
V
LN
V
LP
+
H
LIM
90
D
Q1
+
+
21
22
V
Q1
F
Q3
20
F
Q2
F
Q1
+
E
GND
D
Q2
V
Q2
C
2CM
V+
C
1CM
G
21
G
11
E
N
–
+
64
9
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