What is the TDC(Time To Digital Convertor)?

[saeidjabbari]

Hi
First of all what is the TDC and where is use? i need very short period of time(pS) and how can i use TDC ?
finally excuse me about my English.
Thanks for Advice

 

[vipinlal]

A TDC is used to find the time interval between two pulses or two events. Since you want a high speed TDC just go through this paper.
https://www.ssl.berkeley.edu/~mlampton/LamptonRaffanti.pdf

--vipin
https://vhdlguru.blogspot.com/

 

[saeidjabbari]

Thanks a lot vipinlal
I'm want to design an high resolution TDC between (20-120 picoseconds), now where can i start to design and what kind of component should i use? can i use ARM or AVR or PIC microcontrollers to this project?

Thanks for Advice

 

[sepehri]

hi saeidjabbari
for use of arm to make a high resolution timer your clock must be >10Ghz. or use of arm pipe line that is hard.
u can search on web "tdc" or "high resolution time to digital converter" to get more information about method of tdc.
most of method based on propagate's delay of logic cell in fpga.

 

[mrflibble]

That post was more than a year old.

But that aside ...

for use of arm to make a high resolution timer your clock must be >10Ghz. or use of arm pipe line that is hard.

No you don't. You can do just fine with a regular boring arm, pic or avr. Just google "interpolating time interval counter" and you'll see what I mean. Basically it's charging caps with a known current, and then sampling after the charging has stopped. (after the START/STOP conditions).