Monday, June 4, 2012

JFET Nixie Tube Driver

This is a driver circuit for nixie tube. This circuit uses 2N3684  as nixie tube drivers because its Vp is 2-5 volts which is ideally matches TTL-DTL logic level. Compared with bipolar transistor, the JFET is immune to almost all of the failure mechanism found in bipolar transistor. Here is the circuit :
JFET Nixie Tube Driver circuit schematic diagram
To prevent breakdown of the JFETs, this circuit uses diodes that produces 50Volt prebias line. There is no voltage connection on the transistor ‘s can since the 2N3684 is in a TO-72 package. [Source: http://www.hqew.net/circuit-diagram/JFET-Nixie-Tube-Driver_3450.html]

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