In my opinion, you want a transistor rated at the full anode-voltage in
order to ensure reliability. This is probably more critical for MOS
devices, because of the risk of oxide breakdown.
Basically, when the cathode driver is off, there is only leakage current,
typically less than 1uA.
neonixie-l@googlegroups.com
Subject: RE: [neonixie-l] How much voltage do cathode transistors need to be
able to handle?
According to Mr. Ohm, the voltage drop over a resistor is equal to the
resistance multiplied by the current. In the off state, the current is 0A, so
regardless of the value of
According to Mr. Ohm, the voltage drop over a resistor is equal to the
resistance multiplied by the current. In the off state, the current is 0A, so
regardless of the value of the anode resistor, the drop over the anode resistor
is 0V. The switching transistor therefore sees the full voltage
Bill van Dijk
> *Sent:* Friday, October 23, 2015 8:14 AM
> *To:* neoni...@googlegroups.com
> *Subject:* RE: [neonixie-l] How much voltage do cathode transistors need
> to be able to handle?
>
>
>
> According to Mr. Ohm, the voltage drop over a resistor is equal to the
> resista
Greg,
The Nixie tube is not at all a resistive device. It's like a 150V Zener
diode. Therefore, your analysis doesn't make sense.
The Nixie tube has the ability to stand off about 70-100V before current
flows, and then the current is microamperes. You can do this test easily
with a
http://www.tayloredge.com/storefront/SmartNixie/DataSheets/Datasheet_SmartNixie.pdf
If you look at Fig20 of the above data sheet, it shows the voltage on the "6"
cathode transistor while the tube cycles continuously from "0" to "9". As you
can see, the voltage on the transistor is not a single
October 23, 2015 8:14 AM
To: neoni...@googlegroups.com
Subject: RE: [neonixie-l] How much voltage do cathode transistors need to be
able to handle?
According to Mr. Ohm, the voltage drop over a resistor is equal to the
resistance multiplied by the current. In the off state, the current
