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Colour TV set with FM radio function

A television and color technology, applied in the electronic field, can solve the problems of inability to integrate, realize, and increase the reception of FM broadcast programs, and achieve the effect of high economic value and perfect tuning function.

Inactive Publication Date: 2003-09-17
HISENSE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this method is directly transplanted into a color TV, it cannot be well integrated with the sound signal of the TV, and the purpose of increasing the reception of FM broadcast programs in a color TV cannot be achieved.

Method used

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  • Colour TV set with FM radio function
  • Colour TV set with FM radio function
  • Colour TV set with FM radio function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a color TV set with FM radio function includes an image processing part and a sound processing part of the color TV set, wherein the sound processing part of the TV set is composed of a signal receiving antenna, a high-frequency tuner, an intermediate frequency amplifier, and a sound detector. frequency converter, audio control and power amplifier, speaker and television microprocessor.

[0021] When only receiving monophonic FM radio programs, the color TV set also has an output receiving intermediate frequency amplifier, which is used to separate the FM signal from the audio detection and automatic frequency tuning discriminator control device;

[0022] and a FM signal and TV signal switcher for selectively outputting the TV audio signal output by the sound discriminator or the FM signal output by the audio detection and automatic frequency tuning discriminator control device;

[0023] The switching control end of the FM signal and the TV s...

Embodiment 2

[0026] Such as figure 2 Shown, if will receive the program of stereophonic sound, then on the basis of embodiment one, its audio frequency is detected and the output of automatic frequency tuning frequency discriminator control device is connected with a FM stereo for demodulating FM signal into left and right channel output decoder;

[0027] The output of the sound discriminator is connected to a TV stereo decoding circuit for demodulating TV sound signals into left and right channel outputs;

[0028] The above-mentioned FM signal and TV signal switcher switches the stereo output.

[0029] Such as image 3 As shown, the FM discriminator adopts the automatic frequency tuning discriminator of the original TV set, the model of the stereo decoder is TA7343AP and its peripheral circuits, and the switcher for FM signal and TV signal uses a three-way two-choice chip N1, and its model is TC4053 . Stereo decoder TA7343AP's 8-pin and 9-pin separate the left and right channel signa...

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Abstract

A colour TV set with FM radio function features that the high-frequency tuner, MF amplifier,MF discriminator of image and microprocessor in the TV set are used for said FM radio function. It also hasother functions of automatic memory of station's frequency and position, display on screen and memory of multiple stations' positions. Its advantages include high receiving effect and complete tuningfunction.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a sound processing scheme when an FM radio program receiving function is added to an original color TV set. Background technique [0002] At present, general color TV sets do not have the function of receiving FM radio programs. The general FM radio mixes the FM broadcast signal to generate a 10.7MHZ intermediate frequency signal, and after several stages of amplification, the frequency discrimination generates an audio signal. If this method is directly transplanted into a color TV set, it cannot be well integrated with the sound signal of the TV set, and the purpose of increasing reception of FM broadcast programs in a color TV set cannot be realized. Contents of the invention [0003] The object of the present invention is to solve the above-mentioned problems, and provide a color TV set with a FM radio function that can simply realize the FM reception funct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/44
Inventor 李砚泉
Owner HISENSE
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