Compensated E/A Transfer Function (resistive Load, refer to fig. 8a):

High Frequency Gain:

Zero:

z := 15

Hz

Transfer Function:

G1

1

ω

2

⋅ π ⋅ z

j

Open Loop Transfer Function (resistive load)

F(

ω): = G(ω) ⋅ G1(ω)

ΦF(ω): = arg (F(ω)) ⋅

180

π

Crossover Frequency:

fc: = |root (|F(2

⋅ π ⋅ f )| - 1, f)|

fc = 19.805

Hz

0.1

1

10

100

1 .10

3

100

50

0

50

100

¦F¦

f

0.1

1

10

100

1 .10

3

200

160

120

80

40

0

/F

f

0.1

1

10

100

1 .10

3

60

40

20

0

20

¦G1¦

f

0.1

1

10

100

1 .10

3

100

80

60

40

20

0

/G1

f

AN1089 APPLICATION NOTE

10/12