Re: gEDA-user: BC547 vs. 2N3904

2006-10-31 Thread Wojciech Kazubski
Does driving the transistor into cutoff but not saturation also count as saturation switching? CL No, saturation is when collector voltage drops below base level and the collector junction becomes forward biased. Charge stored in this junction is the cause of swithing delays. Swiching

gEDA-user: BC547 vs. 2N3904

2006-10-30 Thread Karel Kulhavy
Do you like more BC547C for higher frequency applications or 2N3904? I once did a simulation for some Ronja differential limiting amplifier which showed that BC547C is a bit better than 2N3904 because, despite it being lazy, it has higher amplification. Is it possible to get rid of oscillating

Re: gEDA-user: BC547 vs. 2N3904

2006-10-30 Thread Stefan Salewski
Karel Kulhavy wrote: Do you like more BC547C for higher frequency applications or 2N3904? Not sure if everyone knows: Usegroup sci.electronics.design (and de.sci.electronics) exists. In my opinion this is the perfect location to discuss general electronics topics. Best regards Stefan

Re: gEDA-user: BC547 vs. 2N3904

2006-10-30 Thread Wojciech Kazubski
Do you like more BC547C for higher frequency applications or 2N3904? I once did a simulation for some Ronja differential limiting amplifier which showed that BC547C is a bit better than 2N3904 because, despite it being lazy, it has higher amplification. Yo can also use BF240 (SMD variant