Multi-segment LC oscillator with wide tuning range

A wide tuning and oscillator technology, applied in the field of LC oscillators, can solve problems such as poor noise performance, low output frequency, and narrow tuning range, and achieve the effect of large frequency margin, high output frequency, and wide tuning range

Pending Publication Date: 2021-03-12
BEIJING BAIRUI INTERNET TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly provides an LC oscillator with a multi-segment wide tuning range, which solves the problems of low output frequency, narrow tuning range and poor noise performance in the prior art

Method used

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  • Multi-segment LC oscillator with wide tuning range
  • Multi-segment LC oscillator with wide tuning range
  • Multi-segment LC oscillator with wide tuning range

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Embodiment Construction

[0012] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0013] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or a...

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Abstract

The invention discloses a multi-segment LC oscillator with a wide tuning range, and belongs to the field of circuit design. The multi-segment LC oscillator with the wide tuning range comprises a variable capacitor module, a first voltage-controlled output voltage end, a first blocking capacitor, a first variable capacitor, a second voltage-controlled output voltage end, a second blocking capacitor, a second variable capacitor, a bias voltage end, a first bias resistor, a second bias resistor and a control voltage end; and the power capacitor module comprises a plurality of groups of switched capacitor arrays, and one group of switched capacitor arrays comprises a first power capacitor, a second power capacitor, a first load resistor, a second load resistor, a first inverter, a second inverter, a first transistor, a second transistor, a third transistor and a fourth transistor. According to the invention, a multi-segment, wide-range and low-gain tuning curve is realized.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to an LC oscillator with a multi-segment bit wide tuning range. Background technique [0002] Ring oscillators are easy to integrate, but have poorer phase noise performance than LC oscillators. A ring oscillator cascaded with CMOS inverters, assuming that the initial voltage of each node when the circuit starts to work is the logic threshold V of the inverter trip . If the stages of inverters were the same and the device was noise-free, the circuit would stay in this state forever, but noise components would perturb the voltage at each node, resulting in an ever-amplifying waveform, and eventually the signal would swing to the supply voltage. The basic principle is, assuming that at the beginning of the circuit, the output voltage V of the first-stage inverter X =V DD , at this time V Y = 0, V Z =V DD , when the circuit starts to work, the input of the first-stage inverter is V...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/12
CPCH03B5/1206
Inventor 苏杰朱勇徐祎喆
Owner BEIJING BAIRUI INTERNET TECH CO LTD
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