Patent ID: 11923856
Assignee: XILINX, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method of time-to-digital conversion, comprising:
delaying a first signal with a delay line comprising a plurality of first delay elements coupled in series, each of the plurality of first delay elements having a first delay time;
delaying a second signal with a second delay line comprising a second delay element having the first delay time;
delaying the second signal with a third delay line comprising a third delay element having a second delay time, the second delay time being smaller than the first delay time;
comparing a delayed version of the first signal from a first delay element on the delay line with a first delayed version of the second signal from the second delay element;
comparing the delayed version of the first signal from a first delay element on the delay line with a second delayed version of the second signal from the third delay element; and
outputting a digital signal representing a time difference between the first signal and the second signal, based on the comparisons.