How to get 50ps delay when the input is around 4mV?

[aliflaila420]

i'm trying to design a analog delay circuit which will delay the input by 50ps. The problem is:

a) input level is very low (±4mv). so can't use inverter chain.
b) input signal is of very high frequency. 20GHz or more.

any advice would be greatly appreciated........

 

[kalyanasv]

Hi,

Essentially capacitive delay is the easy way. the other option is trying to incorporate a buffer but to get such small delays of 50ps would be expensive and difficult at 20Ghz. (Unless you have Analog ASIC design..). Choose a pico-femto farad range cap.