LP508 View Datasheet(PDF) - Unspecified

Part Name

Description

MFG CO.

LP508

Class A Amplifier with 2 Independent Gain Blocks

Unspecified 

RMIC

5

18K

6

BASE CURRENT

COMPENSATION

1

8

33K

3

Patent No.154104

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

Fig. 2 Functional Schematic

7

RE

2

VB = 1.3 VDC

1.0

CS

RS

0.22

3.9K

RMIC

4

-A

3

1

RVC 100K

5

18K

-B

6

7

RE

8

2

RL = 6K

Gain of stage

A = 20Log10

RVC

RS

Gain of stage B = 2L0og10

RL // 18K

RE

For low impedance receivers, a capacitor from pin 6 to pin 2 may be required for stability.

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

Fig. 3 Typical Hearing Aid Circuit

3

500 - 71 - 9

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