Cursor annular time-digit converter

Abstract

The invention provides a cursor annular time-digit converter. The cursor annular time-digit converter comprises a first pulse width generator, a quick voltage control delay chain, a second pulse width generator, a slow voltage control delay chain and a comparator array. The cursor annular time-digit converter has high quantization precision and a few structures, and the area can be effectively reduced; when a comparator in the comparator array turns over for the first time, the quick voltage control delay chain and the slow voltage control delay chain can both reset, so that signals of the quick voltage control delay chain and the slow voltage control delay chain are both at low levels, jumping never happens again, and consequently power consumption of work is lowered.

Description

technical field [0001] The invention relates to the field of time-to-digital conversion circuits, in particular to a vernier ring time-to-digital converter. Background technique [0002] Time to Digital Converter (TDC) quantizes a continuous time interval into a digital signal through certain technical means. TDC is widely used in all digital phase-locked loops (ADPLL), high-energy physics experiments, space ranging, biological detection, 3D imaging and other fields. [0003] In terms of quantization accuracy, the quantization accuracy of the vernier-type time-to-digital conversion circuit is very high, while the traditional vernier-type TDC is limited by the link length, and its quantifiable time range is very small. In 2010, Jianjun Yu and others proposed a vernier ring TDC using a ring oscillator structure. The schematic diagram of its realization is as follows figure 1 shown. This structure can greatly increase the time range of quantization while maintaining high pre...

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a vernier ring time-to-digital converter, which is used to solve the problem of quantization accuracy of the time-to-digital converter in the prior art due to uncontrollable factors such as process deviation and temperature change. The problem of lower, and the existence of problems such as larger overall area and higher power consumption

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