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BFSK modulation circuit and method and super-regenerative receiver

A modulation circuit, BFSK technology, applied in the direction of frequency modulation carrier system, etc., can solve the problems of inaccurate comparison results of the establishment time, poor circuit stability, etc., and achieve the effect of accurate comparison results and suppression of common mode signals

Active Publication Date: 2014-04-09
HANGZHOU VANGO TECH
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  • Abstract
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Problems solved by technology

[0005] In view of this, the present invention provides a BFSK modulation circuit, method and super-regenerative receiver to overcome the inaccurate comparison result of the settling time in the prior art due to the irregular noise signal doped in the input signal, and the circuit The problem of poor stability

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  • BFSK modulation circuit and method and super-regenerative receiver
  • BFSK modulation circuit and method and super-regenerative receiver
  • BFSK modulation circuit and method and super-regenerative receiver

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Embodiment Construction

[0043] For reference and clarity, descriptions, abbreviations or abbreviations of technical terms used in the following text are summarized as follows:

[0044] OOK: On-Off Keying, binary on-off keying.

[0045] BFSK: binary frequency shift keying, binary frequency shift keying.

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0047] The present invention provides a BFSK modulation circuit, comprising: a first oscillation circuit, a second oscillation circuit and a comparison circuit. Among them, the fir...

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Abstract

The invention provides a BFSK modulation circuit which comprises a first oscillating circuit, a second oscillating circuit and a comparison circuit. The first oscillating circuit and the second oscillating circuit are both connected with an input signal, the two circuits are in intermittent oscillation at the same time, and the input signal is converted into different voltage values; lastly, the frequency of the input signal is determined through a comparator, and namely the frequency of the input signal is '1' or '0'. By the adoption of the BFSK modulation circuit, a noise signal mixed with the input signal is a common-mode signal, the common-mode signal can be suppressed in a differential form, and therefore a comparison result is more accurate.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, and more specifically relates to a BFSK modulation circuit, method and super regenerative receiver. Background technique [0002] At present, super-regenerative receivers mostly adopt OOK modulation method. According to the difference of the input signal amplitude, the establishment time of the super-regenerative oscillator intermittent oscillation is correspondingly different, so as to determine the input signal as "1" or "0". The BFSK modulation method can improve data transmission rate and anti-noise performance. [0003] Existing BFSK super-regenerative receivers use LC resonant circuit and oscillator, each time the input signal comes, the LC resonant circuit is at f H and f L The oscillator will establish two oscillations respectively, and the establishment time of the two oscillations is different, and the corresponding frequency with the shortest time is the frequency of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/10
Inventor 虞小鹏刘哲谭年熊
Owner HANGZHOU VANGO TECH
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