AN47
IOUT
0.35
0.3
0.25
0.2
IOUT
0.15
0.1
0.05
0
-0.05
0
200
400
600
800
1000
Figure 4 Typical output current against pot resistance
If linear pot is used, the output current change is not linear against shaft rotation.
In order to make the output current more linear, a log type pot is used.
IOUT vs shaft rotation
350
300
250
200
150
100
50
0
0
10
20
30
40
50
60
70
80
90
100
Shaft rotation (%)
Figure 5 Output current against shaft rotation of log type pot
Europe
Americas
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Corporate Headquarters
Zetex GmbH
Kustermann-park
Balanstraße 59
D-81541 München
Germany
Zetex Inc
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Zetex Semiconductors plc
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Oldham, OL9 9LL
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Hauppauge, NY 11788
USA
3701-04 Metroplaza Tower 1
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United Kingdom
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
europe.sales@zetex.com
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
usa.sales@zetex.com
Telephone: (852) 26100 611
Fax: (852) 24250 494
asia.sales@zetex.com
Telephone: (44) 161 622 4444
Fax: (44) 161 622 4446
hq@zetex.com
For international sales offices visit www.zetex.com/offices
Zetex products are distributed worldwide. For details, see www.zetex.com/salesnetwork
This publication is issued to provide outline information only which (unless agreed by the company in writing) may not be used, applied or
reproduced for any purpose or form part of any order or contact or be regarded as a representation relating to the products or services concerned.
The company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service.
www.zetex.com
6
Issue 1 - August 2006
© Zetex Semiconductors plc 2006
ZETEX [ ZETEX SEMICONDUCTORS ]
