Philips Semiconductor

Product data

NE5517/NE5517A/

AU5517

Dual operational transconductance amplifier

2002 Dec 06

11

APPLICATION HINTS

should be chosen not greater than 1 mA. The current mirror ratio

should be as accurate as possible over the entire current range. A

current mirror with only two transistors is not recommended. A

suitable current mirror can be built with a PNP transistor array which

causes excellent matching and thermal coupling among the

transistors. The output current range of the DAC normally reaches

from 0 to –2 mA. In this application, however, the current range is

I

V

REF

R

REF

+ 2 @

5V

10k

W +

1mA

4

6

3

–

+

NE5517

5

11

1

7

8

VIN

R4 = R2/ /R3

+VCC

VC

R2

R3

R1

RL

RS

+VCC

INT

VOUT

–VCC

IOUT

IABC

TYPICAL VALUES: R1 = 47k

R2 = 10k

R3 = 200Ω

R4 = 200Ω

RL = 100k

RS = 47k

INT

SL00315

Figure 10.

4

3

–

+

NE5517/A

11

+VCC

8

VOUT1

–VCC

13

6

14

–

+

NE5517/A

9

VC

RS

VOUT2

–VCC

VIN1

VIN2

30k

10k

10k

RIN

RIN

RP

+VCC

RD

15k

1

16

12

10k

RL

5.1k

+VCC

INT

INT

+VCC

10k

RL

10

IABC

IABC

15

15k

RP

+VCC

RD

1k

RC

1k

SL00316

Figure 11. Gain-Controlled Stereo Amplifier