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CMOS-based high-precision numerically-control oscillator delay basic unit

A technology of numerical control oscillator and basic unit, which is applied in the direction of automatic power control, electrical components, etc., can solve the problems of inflexible and stable production, and achieve the effect of less complexity.

Active Publication Date: 2015-09-16
SOI MICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the continuous development of Moore's Law, the problems of anti-noise and drift of analog phase-locked loops have gradually become prominent, and the production is not flexible and stable enough.

Method used

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  • CMOS-based high-precision numerically-control oscillator delay basic unit
  • CMOS-based high-precision numerically-control oscillator delay basic unit
  • CMOS-based high-precision numerically-control oscillator delay basic unit

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Embodiment Construction

[0015] Embodiments of the present invention are described in detail below.

[0016] Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in i...

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Abstract

The invention provides a CMOS-based high-precision numerically-control oscillator delay basic unit. The CMOS-based high-precision numerically-control oscillator delay basic unit structure comprises a coarse adjustment part which comprises at least one standard cell library-based unit with a phase inverting function, and a fine adjustment part which comprises a plurality of transistor width-adjustable PMOS transistor array. With the numerically-control oscillator delay basic unit adopted, a numerically-control oscillator can obtain high-precision delay time; and since the delay time is in a linear corresponding relationship with the width of PMOS transistors, and therefore, the implementation complexity of a system is low.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a delay basic unit of a numerically controlled oscillator. Background technique [0002] With the explosive development of wireless communication, the combination of related circuits and corresponding structural systems have also attracted widespread attention, among which digital switches have become new stars in many fields. However, the digital switch is expected to work in an adjustable frequency range, but the conventional quartz crystal oscillator can only provide a single frequency, which cannot meet the operating frequency requirements of the digital switch. [0003] The operating clock frequency in modern VLSI (Very Large Scale Integration) circuits has been raised to GHZ. In order to provide such high performance, the clock recovery circuit and clock generation circuit also need to generate such a high frequency. Under this requirement, a variety of frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/099
Inventor 乔树山谢正章赵慧冬
Owner SOI MICRO CO LTD