GK504 데이터 시트보기 (PDF) - Gennum -> Semtech

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GK504

Low Current Preamplifier with Output Limiting

Gennum -> Semtech 

RMIC CS

3k92 0µ22

RMIC

1µ0 3

2

A

RP1

B

C

RP2

AC SOURCE

50Ω

1

10

98

7

6

R MPO

=0

100k 10k

RGT

100k 0µ1

RVC

All resistors in ohms, all capacitors in µF, unless otherwise stated.

This circuit as shown was used to generate the following graphs unless

otherwise stated.

Fig. 5 Characterization Circuit

VB =1.3 VDC

4

5

0µ1

+

BUFFER

-

RL

50k

AC

VOLTMETER

-5

-15

RVC = 100k

-25

-35

RVC = 33k

-45

-55

RVC = 10kΩ

-65

-75

RVC = 3.3kΩ

-85

-140 -120

-100

-80

-60

-40

-20

INPUT (dBV)

Fig. 6 I/O for Various RVC Values

-10

-14

-18

-22

-26

-30

-34

-38

-100

RMPO= 0

RMPO = 3.3k

RMPO = 10k

-80

-60

-40

-20

INPUT (dBV)

Fig. 7 MPO for Various RMPO Values

2

0 CIN = 0.22µ

-2

-4 CIN = 0.1µ

-6

-8

-10

CIN = 0.047µ

-12

-14

CIN = 0.033µ

-16

-18

-20

20

200

2K

20K

FREQUENCY (Hz)

Fig. 8 Frequency Response for Various CIN Values

10

9

8

7

6

5

4

3

2

1

0

-90

-86

-82

-78

-74

-70

INPUT (dBV)

Fig. 9 Distortion vs Input Level (RGT = RVC = 100k)

5

520 - 47 - 05

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