Avalance pulser low voltage?

neazoi

Advanced Member level 6
Joined
Jan 5, 2008
Messages
4,123
Helped
13
Reputation
26
Reaction score
15
Trophy points
1,318
Location
Greece
Activity points
36,955
Hi I have seen this avalance puser and I want to try it.

1. Will it produce one spike pet trigger pulse, and then stop as the trigger pulse is removed?

2. Can I drive it with a sinewave and will it produce 1 pulse per positive sinewave peak, if adequate signal level is provided?

3. How about lower voltages, should I find a BJT with lower Collector emitter breakdown voltage? (I am not sure if I will have to look for lower or higher current at that breakdown voltage)
 

Attachments

  • Simplified-schematic-of-avalanche-pulse-generator.png
    32.7 KB · Views: 63

1. Once triggered, transistor in avalanche breakdown is not controllable by base voltage. Pulse is either terminated by suitable designed output circuit or transistor will be destroyed.
2. Slow rising trigger can work under circumstances but expect reduced output pulse quality.
3. It's generally assumed that the voltage range for avalanche breakdown operation is between Vcb,max and Vce,max. Also that transistors with thin, low doped epitaxial layer are preferred.

I haven't yet seen avalanche pulsers with operation voltage < 50 V.
 

    neazoi

    Points: 2
    Helpful Answer Positive Rating
You must log in or register to reply here.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…