Patent ID: 8957712
Filing Date: 2015-02-17
Classification: G04F,H03L,H03M

Abstract:
1. A time-to-digital converter comprising: an edge detector responsive to first and second signals, said second signal comprising a plurality of edges during each period of the first signal, said edge detector adapted to detect, during each period of the first signal, an edge of the second signal that is closest to an edge of the first signal; a time-to-voltage converter adapted to generate a voltage proportional to a difference in time between the detected edge of the second signal and the edge of the first signal, wherein the time-to-digital converter has first and second differential outputs adapted to be charged to a predefined voltage level in response to a reset signal, wherein a first conductive path is formed between the first differential output and a first supply voltage in response to the edge of the first signal during a first time period, and wherein a second conductive path is formed between the second differential output and the first supply voltage in response to the detected edge of the second signal during a second time period, said first and second time periods not to overlap; and an analog-to-digital converter adapted to digitize a difference in voltages of the first and second differential outputs.