VASANSNS
Junior Member level 1
Hello everybody,
I have an application which needs a pulse input ranging from +15v to -3v operating at 17.5 Mhz. The load capacitor is 150pF and the required rise and fall time of the pulse is 10nS. I am building a circuit with BJT's (both NPN and PNP) . I need some idea about the criteria for selection of BJT's available in the market.
Can somebody suggest some available NPN and PNP transistors which work in this range.
Also i tried searching for some RF transistors, but i was not sure if they are capable of handling such huge loads. The max collector current for RF transistors was around 50mA. I was not whether its possible to get such a strict rise/fall time with the given load. Can somebody comment on this calculations.
Also any other suggestion or reference links are also welcomed.
Regards
SNS
I have an application which needs a pulse input ranging from +15v to -3v operating at 17.5 Mhz. The load capacitor is 150pF and the required rise and fall time of the pulse is 10nS. I am building a circuit with BJT's (both NPN and PNP) . I need some idea about the criteria for selection of BJT's available in the market.
Can somebody suggest some available NPN and PNP transistors which work in this range.
Also i tried searching for some RF transistors, but i was not sure if they are capable of handling such huge loads. The max collector current for RF transistors was around 50mA. I was not whether its possible to get such a strict rise/fall time with the given load. Can somebody comment on this calculations.
Also any other suggestion or reference links are also welcomed.
Regards
SNS