Normally On switch

Hi,

I need a switch or some kind of FET etc. that has a low impedans (10 Ohm) when no supply is present.

There is no room for some kind of relay, the housing max hight is 1.1mm

Thanks,

regards Jens

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Reply to
Jens Gydesen
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Isn't that a JFET? But 10 ohms might be hard to find.

What other conditions apply?

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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Reply to
Jim Thompson

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Supertex makes several depletion-mode mosfets, but even they will be a tight fit in 1.1 mm of headroom. They require a negative gate voltage to switch them off.

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-- Joe Legris

Reply to
J.A. Legris

Here from 6 ohms up

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- Henry

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Reply to
Henry Kiefer

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What is the specific application? (Schematics appreciated to a.b.s.e. if possible).

It's possible an enhancement mode P-channel device with gate pulled low might do what is required, a depletion mode device, a JFET or even a diode - depends on what is required.

Cheers

PeteS

Reply to
PeteS

Hi,

the job for the FET is to shortend a 13MHz RFID receiver, and open for it when required.

The RFID receiver must be shortend when the battery is discharged.

Regards Jens

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Reply to
Jens Gydesen

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