Josip Popovic wrote:
> I would like to now if anyone of you had to create a PCB trace with a
> precise inductance value?
>
> In the spec for LT1533 (Linear Technology switching regulator) is shown
> that
> the device should have 25nH inductance between the ground pin and the
> PCB
> GND. According to my calculations a microstrip line with W=7 (H=5, T=2.8
> and
> Er=4.3) has app. 6.5nH/inch. So to get a 25nH trace one would need to
> have a
> 3.8inch long trace.
>
> Q1: Is there a trace configuration that I could use to create a 25nH
> inductance that would not be so lengthy and in the same time would not
> act
> as an antenna?
>
> Q2: Is my calculation (app 6.5nH/inch) correct?
>
> Josip
>
> **** To unsubscribe from si-list: send e-mail to [email protected]. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****
-- Philip R. Gantt [email protected] . . Phone : (408) 527-2918 | | Fax : (408) 526-5504 ||| ||| Pager : (408) 814-8868 ||||| ||||| 170 West Tasman Drive, SJ-G2 ||||||||| ||||||||| San Jose, CA 95134-1706 (U.S.A.) .:|||||||||||||||||||||||||:.
**** To unsubscribe from si-list: send e-mail to [email protected]. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list ****