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Time-to-digit converter and method thereof

A time-to-digital converter technology, applied in the field of time-to-digital converters, can solve the problems of large area of ​​time-to-digital converters, and achieve the effect of saving hardware quantity and reducing chip area

Active Publication Date: 2012-08-22
SEMICONDUCTOR MANUFACTURING INTERNATIONAL (BEIJING) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a time-to-digital converter and its method, which solves the problem of relatively large area of ​​time-to-digital converters in the prior art

Method used

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  • Time-to-digit converter and method thereof
  • Time-to-digit converter and method thereof
  • Time-to-digit converter and method thereof

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Embodiment approach

[0068] refer to Figure 7 As shown, the second implementation of the time-to-digital converter of the present invention includes: at least four flip-flops 100a, 100b, 100c, 100d; logic units 200, 200'; counting unit 500; first encoding unit 600; second encoding unit 700 and subtraction unit 800, described flip-flop 100a, 100b, 100c, 100d; Counting unit 500; The first coding unit 600; ; The counting unit 5; the first encoding unit 6; The function of the logic unit 200 is the sum of the functions of the aforementioned pulse unit 3, the start signal unit 2 and the end signal unit 4, that is, the logic unit 200 is used to represent the direction of the signal to be tested in the obtained continuous three discrete signals. When the valid edge flips, the valid start signal is output when the corresponding reference clock reaches the valid edge; it is used when the discrete signal output by the corresponding flip-flop is the same valid value twice consecutively, when the correspondi...

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Abstract

The invention relates to a time-to-digit converter and a method thereof. The time-to-digit converter acquires instantaneous values of signals to be detected to form discrete signals through at least four triggers at respective corresponding reference clocks, delays corresponding effective edges of corresponding reference clocks of various triggers, calculates the effective level time of the signals to be detected by acquiring the distance between two corresponding discrete signals of the signals to be detected when the signals to be detected are overturned from the effective edges, and outputsthe signals in a form of digital signals. The time-to-digit converter saves the number of hardware and reduces the area of chips as well.

Description

technical field [0001] The invention relates to a time-to-digital converter and a method. Background technique [0002] A time-to-digital converter (TDC, Time-to-digital Converter) is a timer that converts time intervals into digital signals. The most basic time-to-digital converter uses the oscillator counting method, that is, a counter counts a series of digital pulses within the time range to be measured, and represents the number of digital pulses counted within the time to be measured Digital signal output of the time to be measured. Although the existing oscillator counts can achieve stable high-speed pulses, the accompanying power consumption and noise are unacceptable. [0003] US Patent No. 7205924 discloses a structure of a time-to-digital converter 500 . refer to figure 1 As shown, it includes an inverter 518 for inverting the phase of the signal to be tested HCLK, a differential signal generating circuit 502 for adjusting the phase difference between the rece...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/50
Inventor 刘渭李伟任鹏林庆龙王阳元
Owner SEMICONDUCTOR MANUFACTURING INTERNATIONAL (BEIJING) CORP