For these frequecies 1µF sounds like talking about DC.
You can obviously use µFs and nFs capacitors, but more effective would be to use pFs small in size ceramic capacitors, such as, for example, from MURATA: **broken link removed**
And I have here in mind both functions: AC coupling/DC blocking and De-coupling.
Regards,
IanP
Hello,
I did use normal, Yes, normal 100NF 0402 ceramic cap for 10Gb/s 50 ohm termination, no problems at all.
It did compare it with high Freq capacitors that cost $1 with no different in performance at all!
That's surpising. According to AVX application notes :
**broken link removed**
If the signal operating frequency is above the capacitor Serial resonance frequency, the capacitor will behave inductively, which it will performs as Low Pass filter and you won't get anything at the output. Pls advice. I just read this.
Regards,
Ipenema
Added after 1 minutes:
hi moda and Wenye,
Can you pls let me know which model/brand that you use?
Hi again
I know the freq graphs of normal 100NF ceramic cap but:
I did some test with VERY sensitive circuits with jitter of 10Psec for 50 ohm application and to my surprise as well I didn't had any degradation in performance for a normal ceramic cap or high price good cap for 10Gbsec systems!!!
Just use normal any brand 100NF 0402 and it will work OK, no problems.
I don't see what the problem is.Why not connect in parallel two capacitors-one normal 0.1uf for lower frequencies and one ceramic 100pF for higher freq.