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Low-cost ring oscillator for NB-IoT

A ring oscillator, a low-cost technology, applied in the field of narrowband Internet of Things, can solve problems such as design difficulties and inability to start oscillation, and achieve the effect of improving circuit complexity and layout size area

Inactive Publication Date: 2018-05-18
重庆湃芯微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When we want to use some special phase difference clock signals, there will be design difficulties. For example, 90° phase difference requires 4 inverters to be connected end to end, and 45° phase difference requires 8 inverters to be connected end to end. The structure is incapable of vibrating; therefore it needs to be improved

Method used

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  • Low-cost ring oscillator for NB-IoT

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Embodiment Construction

[0024] The following will be combined with Figure 1-Figure 4 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The present invention provides a low-cost ring oscillator for NB-IoT through improvement, such as Figure 1-Figure 4 As shown, it can be implemented as follows;

[0026] When the present invention is implemented, the ring oscillator built with only inverters includes four of the two types of inverters, totaling eight. The circuit structure is: N1 node is connected to the input of I1, the output of I4, the input of I7, and the output ...

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Abstract

The invention discloses a low-cost ring oscillator for an NB-IoT. The ring oscillator is built by only using inverters which including four A inverters and four B inverters, wherein the four A inverters are connected end to end; after being built, the ring oscillator is powered on to form a stable structure; and meanwhile, the B inverters are added between an N1 node and an N3 node, or between anN2 node and an N4 node, to repel from a balanced state. The low-cost ring oscillator provided by the invention utilizes the advantages of the ring oscillator and improves the part of defects of the same, and is implemented by using two kinds of inverters, so that the circuit complexity and the layout size area are improved.

Description

technical field [0001] The invention relates to the field of narrowband Internet of Things (NB-IoT), in particular to a ring oscillator for generating an oscillation signal at a lower cost and implemented by using an inverter. Background technique [0002] As we all know, NB-IoT refers to the cellular-based narrowband Internet of Things, which is an important branch of the Internet of Everything. NB-IoT is built on a cellular network and only consumes about 180KHz of bandwidth. It can be directly deployed on a GSM network, UMTS network or LTE network to reduce deployment costs and achieve smooth upgrades. [0003] NB-IoT is a relatively new technical concept in the IoT field, and its main content is to support the cellular data connection of low-power devices in the wide area network. In this way, we can interconnect objects based on the current cellular network, and achieve greater success at a lower cost. [0004] Because NB-IoT supports long standby time and high-effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/012H03K3/03H03L7/099
CPCH03K3/012H03K3/0322H03L7/0998
Inventor 唐枋
Owner 重庆湃芯微电子有限公司
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