Comparator threshold voltage self-calibration circuit in superregenerative receiver

A super regenerative receiver, threshold voltage technology, applied in multiple input and output pulse circuits and other directions, can solve problems such as changes and affect receiver sensitivity, and achieve the effect of improving sensitivity

Pending Publication Date: 2021-07-13
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through research, it is found that the optimal value will change with external factors such as temperature and process, thus affecting the sensitivity of the receiver

Method used

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  • Comparator threshold voltage self-calibration circuit in superregenerative receiver
  • Comparator threshold voltage self-calibration circuit in superregenerative receiver
  • Comparator threshold voltage self-calibration circuit in superregenerative receiver

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0019] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention relates to a comparator threshold voltage self-calibration circuit in a superregenerative receiver. The comparator threshold voltage self-calibration circuit comprises a comparator and a self-calibration loop, the self-calibration loop comprises a low-pass filter, a pulse width detection unit, a pulse width judgment unit, a digital processing unit and a DAC (Digital-to-Analog Converter); comparing the oscillation envelope input signal A with a threshold voltage signal B by using a comparator to generate a pulse signal C; the pulse signal C is input into a low-pass filter to generate a pulse output signal D; the pulse width detection unit performs enabling counting on the signal D and outputs a numerical signal E in direct proportion to the pulse width of the signal D; the numerical value signal E is input into a pulse width judgment unit, the magnitude of the numerical value E is judged and classified, and an enable signal F is generated; the signal F is input to the data processing unit; the data processing unit identifies the signal F and generates a numerical signal G; the numerical value G is input into the digital-to-analog converter to generate a new threshold voltage signal B; according to the invention, the self-calibration of the threshold voltage of the comparator in the super-regenerator is realized, so that the sensitivity of the receiver is improved.

Description

technical field [0001] The invention relates to the technical field of wireless circuits, in particular to a comparator threshold voltage self-calibration circuit in a super regenerative receiver. Background technique [0002] How to effectively set the threshold voltage of the comparator in the super-regenerative receiver is one of the keys to improve the sensitivity of the super-regenerative receiver. The current public technology fixes the threshold voltage of the comparator in the super-regenerative receiver to an optimal value. The structure of the conventional super-regenerative receiver using the threshold voltage self-calibration circuit is as follows: image 3 As shown, its workflow is as follows Figure 4 shown. Through research, it is found that the optimal value will change with external factors such as temperature and process, thus affecting the sensitivity of the receiver. Contents of the invention [0003] In view of this, the purpose of the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K5/22
CPCH03K5/22
Inventor 阴亚东林潇垄王纪鹏
Owner FUZHOU UNIV
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