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A time-to-digital converter

A time-to-digital converter technology, applied in the field of high-precision and large-scale time-to-digital converters, can solve the problem of large chip area overhead, achieve small area overhead, and achieve the effect of high-precision and large-scale time interval measurement

Active Publication Date: 2016-09-28
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to solve the technical problem that the cost of chip area in the prior art is larger than that of TDL, the purpose of the present invention is to provide a time-to-digital converter with high precision, large input range and small chip area to solve the problems encountered in current time measurement. main problem

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  • A time-to-digital converter
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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0041] Such as figure 1 As shown, the time-to-digital converter described in the present invention includes a coarse detection circuit 101 , an interface circuit 102 , a fine detection circuit 103 and a calculation unit 104 .

[0042] A rough detection circuit 101 has port one, port two and port three, wherein: port three receives the input level signal and is used to select different measurement ranges for different level signals; port one and port two are used to receive respectively Input two transition edge signals with continuous time intervals, and use the circular delay line in the rough detection circuit 101 to roughly measure the time interval between the two transition edge signals with continuous time intervals...

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Abstract

The present invention provides a time-to-digital converter, the converter includes a coarse detection circuit, an interface circuit and a fine detection circuit, wherein: the coarse detection circuit is designed as a loop by designing the delay line, and the decision unit is multiplexed as The delay unit, with the help of the counter, finally realizes the time-to-digital conversion of a large input range; the interface circuit is used to transfer the time margin generated by the coarse detection circuit to the fine detection circuit; the fine detection circuit adjusts the gate oxide capacitance of the FET The frequency difference between the two oscillators in the differential ring oscillator is fixed to a small value, thereby realizing high-precision time-to-digital conversion with adjustable precision. In a word, through the above three modules, the time-to-digital converter in the present invention can perform high-precision and wide-range conversion of time intervals with a small area overhead.

Description

technical field [0001] The invention belongs to the technical field of time measurement and relates to a high-precision and large-range time-to-digital converter. Background technique [0002] As a key technology, high-precision and wide-range time measurement is widely used in many fields, such as laser ranging (LRF), navigation and communication, high-energy physics experiments, satellite monitoring, scientific metrology and other fields. Precise time measurement is indispensable in both national defense and civilian fields, and with the development of technology, time measurement is developing in the direction of high precision and large input range to meet the requirements of many applications. [0003] A time-to-digital converter (Time-to-Digital Converter, TDC) is a device that converts a time interval into a digital output, similar to an analog-to-digital converter (Analog-to-Digital Converter, ADC) to a certain extent, except that The ADC quantifies the voltage or c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/50
Inventor 王新刚杨海钢
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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