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High speed BJT recommendation

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hithesh123

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Can you guys recommend some parts numbers for high speed BJT switch.
Speed is 5MHz, Vcc = 30V, Ic = 100mA
 

hithesh123

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I wanted to know some part numbers that are popular. So it's easy to get them from any local shop rather than digikey.
 

andre_luis

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Depends of local market at each country.
Some brands are more common to find in Asia, Europe and US.

+++
 

hithesh123

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The 2N2222 works almost in the entire FW bandwidth. I suppouse that it is for analog aplication.
Can it swing 0-30V at 1MHz.

I simulated it the falling edge has higher slope than rising edge. I know this is bcoz of the stored base charge. Do you have any circuit/techniques to remove the base charge.
 

keith1200rs

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A Schottky diode from base to collector can help to minimise charge storage and speed up turn-off.

Keith
 

alexxx

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hithesh123 said:
Can it swing 0-30V at 1MHz

I don't think that 1MHz is considered high speed. I suppose that almost every general purpose BJT could reach frequencies above 1MHz.
Take a look at BC817. It is a cheap general purpose npn, that covers your specifications.
 
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