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Anti-interference tuner circuit and anti-interference tuner

A high-frequency head and circuit technology, applied in the field of high-frequency head, can solve the problems of effective signal waveform distortion and distortion, achieve accurate and complete filtering, and improve the effect of transmission quality

Inactive Publication Date: 2020-12-18
天长市晶鼎电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In some cases, the effective signal is partially filtered out, resulting in distortion and distortion of the effective signal waveform

Method used

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  • Anti-interference tuner circuit and anti-interference tuner
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  • Anti-interference tuner circuit and anti-interference tuner

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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. In addition, the technical features in each embodiment or a single embodiment provided by the present invention can be combined arbitrarily with each other to form a feasible technical solution. This combination is not restricted by the sequence of steps and / or structural composition mode, but it must be Based on the ability of those skilled in...

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Abstract

The invention provides an anti-interference tuner circuit and an anti-interference tuner. The anti-interference tuner circuit is characterized in that a first operational amplifier is connected with afrequency converter, the frequency converter is connected with a frequency filter, the frequency filter is connected with a frequency inverse converter, the frequency inverse converter is connected with a waveform comparator, and the waveform comparator is connected with an expected waveform memory, a third operational amplifier and a waveform synthesizer; the waveform synthesizer is connected with the waveform compensator and the power comparator, the power comparator is connected with the second operational amplifier and the output end, and the third operational amplifier is connected withthe frequency converter. According to the anti-interference tuner circuit and the anti-interference tuner provided by the embodiment of the invention, accurate and complete filtering of interference noise can be realized, and the signal transmission quality is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of tuner technology, in particular to an anti-jamming tuner circuit and an anti-jamming tuner. Background technique [0002] The tuner feeds the received microwave signal back to the receiving end for decoding, and decodes the image and audio. Among them, the high-frequency head is also called a low-noise down-converter (LNB). It amplifies the high-frequency signal input by the feed source through a low-noise amplifier, and mixes it with the local oscillator signal after filtering to generate an intermediate-frequency signal, which is connected to the receiver through a cable to complete low-noise amplification and frequency conversion functions. However, a communication line has multiple transponders, and a transponder has multiple downlink frequencies and consists of multiple groups of signals, which results in more clutter in the signal. In order to obtain high-quality effective signals, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44H04N5/50H04N7/20
CPCH04N5/44H04N5/50H04N7/20
Inventor 张星月
Owner 天长市晶鼎电子科技有限公司