Leydig, Voit & Mayer, Ltd.
Time-to-digital converter, all digital phase locked loop circuit, and method
The present invention discloses a time-to-digital converter. The time-to-digital converter includes: a phase interpolation circuit and a time-to-digital conversion circuit. The phase interpolation circuit is configured to receive a first reference clock signal and a second reference clock signal; perform phase interpolation on the first reference clock signal and the second reference clock signal to generate a third reference clock signal; and output the third reference clock signal to the time-to-digital conversion circuit. The time-to-digital conversion circuit is configured to receive the third reference clock signal and a fourth clock signal, where a phase difference between the third reference clock signal and the fourth clock signal is less than a phase difference between the first reference clock signal and the fourth clock signal; measure the phase difference between the third reference clock signal and the fourth clock signal; and convert the measured phase difference into a digital signal for outputting.
Huawei Technologies Co., Ltd
H H H G
H04L H04L H03L G04F
inventional inventional inventional inventional
Shenghua Xiaoyu
Zhou Li