433M digital frequency modulation receiver

A digital frequency modulation and receiver technology, applied in the direction of electromagnetic receivers, etc., can solve the problems of large volume and high manufacturing cost

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A digital frequency modulation and receiver technology, applied in the direction of electromagnetic receivers, etc., can solve the problems of large volume and high manufacturing cost

CN105391497AActive Publication Date: 2016-03-09HARBIN ENG UNIV

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[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048]The patent of the present invention provides a 433M digital FM receiver device. It consists of 6 modules, which are the input low-noise amplifier and the 433M filter part, which are used to amplify and extract the 433M signal; the 392.3M local oscillator source signal circuit part, which is used to generate the 392.3M local oscillator signal; The device and intermediate frequency filter part are used to mix and extract the down-converted 40.7M signal; the demodulation circuit part is used to demodulate the information carried by the carrier; the single-chip microprocessing part is used to control the phase-locked loop and demodulate The circuit part; the power control and ground part of the whole system, which provides different power and ground for the whole device system. The 433M digital FM receiver device provided by the patent of the present invention has i...

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Abstract

The invention relates to the field of digital frequency modulation receivers, and particularly relates to a 433M digital frequency modulation receiver, which comprises a low-noise amplifier and a 433M filter part at the input end, a 392.3M local oscillator source signal circuit part, a frequency mixer and an intermediate frequency filter part, a demodulation secondary frequency reduction circuit part, a single chip micro processing part, and a power control and ground part for the entire circuit diagram. The 433M digital frequency modulation receiver provided by the invention has the advantages that the design is clever; the layout is reasonable; the power consumption is low; the sensitivity is high; the dynamic range is large; and by adopting a 2FSK modulation and demodulation mode, real-time communication with a 433M digital frequency modulation transmitter can be well carried out. The 433M digital frequency modulation receiver has a high scientific research value in the ultra-short wave communication field and has a certain project application value.

Description

technical field [0001] The patent of the present invention relates to the field of digital FM receivers, in particular to a 433M digital FM receiver. Background technique [0002] The existing receiver types mainly include phase modulation, frequency modulation receiver and amplitude modulation receiver, and frequency modulation receiver is the most commonly used. Among them, there are several types of FM receivers, such as superheterodyne double conversion receivers, image frequency suppression receivers, zero-IF receivers, and digital radio frequency receivers, etc. Of course digital RF receivers function best. [0003] For the superheterodyne double conversion receiver, its main advantage is that it is simple in structure and easy to implement. Although its structure is simple, so far, the superheterodyne double conversion receiver is still the most commonly used by engineers. structural form. The disadvantage of the superheterodyne double conversion receiver is that t...

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Application Information

Patent Timeline

09 Mar 2016

Publication

CN105391497A

IPC: H04B10/60

CPC: H04B10/60

Inventors: 张朝柱; 陈天富