935260062118 Просмотр технического описания (PDF) - Philips Electronics

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935260062118

HITAG™ 2 Chip Module

Philips Electronics 

Specifications of the HT2 MOA3 S20

Rev. 1.1

1997-08-19

For a rough estimation ( ± 10 %) of the number of coil windings following formula can be used.

It is assumed that the winding is done in circular form.

N=

1,8 5

L

u

2 U ln ( )

d

N ... number of windings

L ... inductance [nH]

U ... average coil circumference [cm]

d ... copper diameter [mm]

u ... average coil circumference [mm]

For fine tuning a measurement of the inductance and an according adjustment of the number of

windings is necessary. This process always needs some iterations.

Ht2moa3.doc/HS

Page 11 of 22

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