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#1
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extreme low power transistor?
Can anyone point me in the direction of devices/manufacturers/data sheets
for a transistor capable of operating with extreme low power? |
#2
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extreme low power transistor?
On Sat, 20 Sep 2003 17:09:01 -0400, "Bob Morein"
wrote: Can anyone point me in the direction of devices/manufacturers/data sheets for a transistor capable of operating with extreme low power? Something with a small die. 2N5210 maybe? http://www.fairchildsemi.com/ds/2N/2N5210.pdf However most of the power dissipation is in the way the circuit is designed. In the 70s, most smoke detectors were made using discretes, either bipolar or the CMOS 4007 chip, and the batteries still lasted a long time. I have schematics for a number of these and will post some day. You can use diodes as pullup resistors too. see: http://members.shaw.ca/novotill/Sola...otor/index.htm for an example of this. |
#3
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extreme low power transistor?
Point out you desired detail specification
flyking "Bob Morein" wrote in message ... Can anyone point me in the direction of devices/manufacturers/data sheets for a transistor capable of operating with extreme low power? |
#4
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extreme low power transistor?
"Flyking" wrote in message ... Point out you desired detail specification flyking "Bob Morein" wrote in message ... Can anyone point me in the direction of devices/manufacturers/data sheets for a transistor capable of operating with extreme low power? I cannot, because I want the absolute lowest. I have no spec. Any info appreciated. |
#5
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extreme low power transistor?
"Stepan Novotill" wrote in message ... On Sat, 20 Sep 2003 17:09:01 -0400, "Bob Morein" wrote: Can anyone point me in the direction of devices/manufacturers/data sheets for a transistor capable of operating with extreme low power? Something with a small die. 2N5210 maybe? http://www.fairchildsemi.com/ds/2N/2N5210.pdf However most of the power dissipation is in the way the circuit is designed. In the 70s, most smoke detectors were made using discretes, either bipolar or the CMOS 4007 chip, and the batteries still lasted a long time. I have schematics for a number of these and will post some day. You can use diodes as pullup resistors too. see: http://members.shaw.ca/novotill/Sola...otor/index.htm for an example of this. Judging by the maximum power dissipation of 600 mw, it would seem an even smaller die is possible. I'm interested in operation approaching the nanowatt level. Possible? |
#6
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extreme low power transistor?
On Sun, 21 Sep 2003 01:36:02 -0400, "Bob Morein"
wrote: "Stepan Novotill" wrote in message .. . On Sat, 20 Sep 2003 17:09:01 -0400, "Bob Morein" wrote: Can anyone point me in the direction of devices/manufacturers/data sheets for a transistor capable of operating with extreme low power? Something with a small die. 2N5210 maybe? http://www.fairchildsemi.com/ds/2N/2N5210.pdf However most of the power dissipation is in the way the circuit is designed. In the 70s, most smoke detectors were made using discretes, either bipolar or the CMOS 4007 chip, and the batteries still lasted a long time. I have schematics for a number of these and will post some day. You can use diodes as pullup resistors too. see: http://members.shaw.ca/novotill/Sola...otor/index.htm for an example of this. Judging by the maximum power dissipation of 600 mw, it would seem an even smaller die is possible. I'm interested in operation approaching the nanowatt level. Possible? 2N5210 has a very high hfe; I think you might need that when operating at rediculously low collector currents and low collector voltages. It is a fairly low power device to boot, and it's very easy to buy one. I'm no expert though. The circuit I linked to (above) runs on a few nA if a low leakage cap is used, yet it uses very ordinary transistors, so yes it can be done. |
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