3

500 - 58 - 6

DECOUPLED A

OUTPUT B

27k

2k7

O/P STAGE I/P

470

MIC BIAS

5

2

4

1

10

13

9

11

12

3

7

6

8

14

600

15k

O/P GND

FEEDBACK

PREAMP I/P

3k5

5k6

CURRENT

TRIM

8k2

2k2

DECOUPLED B

OUTPUT A

PREAMP

GND

PREAMP

O/P

PREAMP STAGE

15k

2k7

O/P STAGE

Fig. 2 Functional Schematic Diagram

Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.

© Copyright 1989 Gennum Corporation.

All rights reserved.

Printed in Canada.

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

DOCUMENT

IDENTIFICATION

PRODUCT PROPOSAL

This data has been compiled for market investigation purposes

only, and does not constitute an offer for sale.

ADVANCE INFORMATION NOTE

This product is in development phase and specifications are

subject to change without notice. Gennum reserves the right to

remove the product at any time. Listing the product does not

constitute an offer for sale.

PRELIMINARY DATA SHEET

The product is in a preproduction phase and specifications are

subject to change without notice.

DATA SHEET

The product is in production. Gennum reserves the right to make

changes at any time to improve reliability, function or design, in

order to provide the best product possible.

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

Fig. 3 Typical Hearing Aid Circuit

0µ1

0µ1

RECEIVER 400

Ω

IMPEDANCE

6µ8

0µ1

0µ1

0µ1

220k

MIC

N/C

LC552

N/C

10µ

5

6

7

1

9

2

10

11

3

12

4

13

8

14

10µ

6µ8

10k