Series Diode Input Impedance???

Off hand does anyone know the approximate input impedance of a series input 1N914 with a 10K ohm resistor connected to the back end going to ground? I want to use a step transformer to feed it.

Space Varmint said:

Off hand does anyone know the approximate input impedance of a series input 1N914 with a 10K ohm resistor connected to the back end going to ground? I want to use a step transformer to feed it.

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hi,
Look at this graph, you should be able to figure out the resistance at different forward currents.

Oh thank you Eric. I will look at this.

Yes, use Ohm's law.

Also note that it's dependant on the temperature, current and that it varies between diodes with the same part number: look at the difference between the typical and maximum vales, the minimum values aren't specified and the difference is probably going to be as great.