audioguru Posted May 5, 2006 Report Share Posted May 5, 2006 Hi Shahzad,"hFE" is a transistor's DC current gain that is different for each transistor that have the same part number, the range of hFE for a 2N3904 transistor at 10mA collector current and 1.0V Vce is 100 to 300. It is measured with the transistor conducting as a linear amplifier, not saturated. In order for a small transistor to saturate well, a lot of base current is used. The datasheet uses 1/10th of the collector current. Quote Link to comment Share on other sites More sharing options...
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