Low-power consumption, high-resolution and all-digital phase-locked loop structure

Abstract

The invention provides a low-power consumption, high-resolution and all-digital phase-locked loop structure. The low-power consumption, high-resolution and all-digital phase-locked loop structure includes a digital circuit part which comprises at least one numerically-controlled oscillator module, and a logic circuit part which comprises a phase discriminator module, an all-digital phase-locked loop controller module and a frequency dividing module. According to the low-power consumption, high-resolution and all-digital phase-locked loop structure, the numerically-controlled oscillator of a coarse adjustment-and-fine adjustment cascade framework structure is adopted, and therefore, an operating frequency range can be extended, and high accuracy can be maintained; and a plurality of segmented time-delay links form a coarse adjustment part, and therefore, power consumption can be decreased.

Description

Technical field [0001] The present invention relates to the technical field of integrated circuits, in particular to an all-digital phase-locked loop structure. Background technique [0002] With the rapid development of the semiconductor industry, and people's increasing material and cultural needs, especially the attention to the size and weight of electronic products, the area of ​​each electronic chip is becoming smaller and smaller. [0003] In today’s electronic systems, users expect all functions to be integrated into a chip. For example, we must design a universal serial bus (USB) function module in the chip; instead of using an off-chip universal serial bus (USB) interface to increase user expenditure. [0004] In systems such as microprocessors, digital switches, and multimedia systems, clock generators or clock multipliers are often needed, so phase-locked loops have become an important structure in this field. In order to reduce the overall power consumption of the syst...

AI Technical Summary

Problems solved by technology

At the same time, the quartz crystal oscillating circuit is not compatible with the manufacturing process, which will cause additional manufacturing costs, and the integration of the circuit is naturally not high enough, of course, it will also bring additional power consumption.

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