GK509 データシートの表示（PDF） - Unspecified

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GK509

Class A Amplifier with 2 DC Coupled Gain Blocks & Schottky Diodes

Unspecified 

RMIC

5

1.0

Cs=0.22

RS ≈3.9K

-A

4

100K

RVC

6

50K

7 0.1

R MPO

21K

-B

8

2

RE

56

3

1

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

V =1.3VDC

B

ED1913

RLAC

RVC

Gain of Stage A = 20 log

RS

RLAC // 21K

Gain of Stage B = 20 log

56 // RE

Fig. 3 Typical Hearing Aid Application

-5

-15

-25

RVC = 100K

-35

-45 RVC = 47K

-55

RVC = 3.3K

-65

RVC = 10K

-75

-85

RVC = 22K

-120

-100

-80

-60

-40

-20

INPUT (dBV)

Fig. 4 I/O Curves at Various RVC Settings

0

-2

-4

-6

-8

-10

-12

-14

-16

-18

-20

-80

RMPO = 50K

RMPO = 22K

RMPO = 10K

RMPO = 0K

RMPO = 3.3K

-70

-60

-50

-40

INPUT (dBV)

Fig. 5 I/O Curves at Various RMPO Values

510 - 69 - 06

4

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