A Time-to-Digital Converter Using Dynamic Threshold Technology

A dynamic threshold, time-digital technology, applied in electrical unknown time interval measurement, devices and instruments for measuring time interval, etc., can solve the problems of a large number of comparators, small measurement range, increased power consumption, etc., to improve speed and reliability , avoid leakage current, reduce the effect of delay time

Active Publication Date: 2021-10-29
NANJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure can achieve very high resolution, but requires a large number of comparators, and its power consumption will increase with the increase of the number of comparators
In addition, the small measurement range of the structure is another disadvantage of it

Method used

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  • A Time-to-Digital Converter Using Dynamic Threshold Technology
  • A Time-to-Digital Converter Using Dynamic Threshold Technology
  • A Time-to-Digital Converter Using Dynamic Threshold Technology

Examples

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Embodiment Construction

[0030] This embodiment provides a time-to-digital converter using dynamic threshold technology, its structure is as follows figure 1As shown, it includes a vernier delay line TDC circuit and an encoder circuit, wherein the vernier delay line TDC circuit judges the time difference between START and STOP signals, and the judgment result is sent to the encoder, and the encoder outputs the corresponding result in binary form.

[0031] The vernier delay line TDC includes three parts: a delay line 1 circuit, a delay line 2 circuit, and a comparator circuit, wherein:

[0032] Delay line 1 is composed of 32 stages of delay buffers with a delay time of Δt1, and delay line 2 is composed of 32 stages of delay buffers with a delay time of Δt2, and Δt1 is greater than Δt2;

[0033] The clock signal START and STOP signals are respectively connected to the input terminals of the first-stage delay buffer of delay line 1 and delay line 2. After the clock signal is delayed by the first-stage de...

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Abstract

The invention relates to a time-to-digital converter using dynamic threshold technology, which is suitable for the near-threshold power supply voltage environment, and includes a vernier delay line TDC circuit and an encoder circuit, wherein the vernier delay line TDC circuit distinguishes the time difference between START and STOP signals , and output the corresponding result in binary form. Due to the low power supply voltage, the overdrive voltage of the transistor is insufficient, and the working current of the circuit will be reduced, so the working time of the vernier delay line TDC will be greatly extended. The present invention uses dynamic threshold technology to connect the substrate of the transistor to the gate terminal, so that the potential of the substrate will change with the change of the gate voltage, the threshold voltage of the transistor will be greatly reduced, and the source-drain current will also increase. The generation of leakage current is avoided to the greatest extent, and the speed and reliability of the circuit are improved.

Description

technical field [0001] The invention relates to a time-to-digital converter, in particular to a time-to-digital converter using dynamic threshold technology, belonging to the technical field of numerical control. Background technique [0002] TDC is widely used in integrated circuits, and is mainly used as a phase detector of an all-digital phase-locked loop. The digital signal output directly reflects the time difference between the rising edges of the two input clock signals, and directly drives the digitally controlled oscillator to make it Its frequency changes. In addition, TDC has a wide range of applications in high-energy physics, laser ranging, medical imaging and other fields. With the rapid development of modern communication technology, WI-FI, Bluetooth, GPS and other modern communication methods have been integrated into people's daily life, and the development of modern communication technology has also promoted the popularization and application of portable d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04F10/00
Inventor 张聪王子轩夏晓娟吉新村胡善文蔡志匡
Owner NANJING UNIV OF POSTS & TELECOMM
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