# I wonder if anyone can tell me the meaning of the statement

• amaresh92
In summary, the statement "a 0.7V silicon diode or 0.3V germinium diode" refers to the voltage drop across the diode when it is forward biased. Germanium diodes have a forward bias voltage of 0.2-0.3V, while silicon diodes have a forward bias voltage of 0.6-0.7V. This voltage is the minimum amount needed to turn on the diode and is determined by the material used in the fabrication process. LED's operate on this principle and can produce different colors based on the material used.
amaresh92
i wonder if anyone can tell me the meaning of the statement " a 0.7V silicon diode or 0.3V germinium diode"?
is this given voltage(0.7 or 0.3) specify the voltage drop across the diode when it is forward biased?

is this given voltage(0.7 or 0.3) specify the voltage drop across the diode when it is forward biased?

Yes. Note that for germanium diodes, the forward bias voltage is said to be around 0.2 to 0.3 volts and for silicon diodes around 0.6 to 0.7 volts.

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Another easy way to look at it is, it's the small amount of voltage needed to turn on the switch. The Si, Ge, GaAs...whatever type, is just the material used during the fabrication process which has different electrical properties.

## 1. What is the statement referring to?

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## 3. Is the statement meant to be taken literally or figuratively?

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