A TV main board pcb and its method for suppressing tdma noise

Abstract

Provided are a television main board PCB and a TDMA noise inhibition method thereof. The television main board PCB comprises an operation amplifier IC and a filtering capacitor. The operation amplifier IC is arranged on the top layer of the television main board PCB and comprises power supply input ends and power supply ground ends. The filtering capacitor and the operation amplifier IC are arranged in a back-to-back manner. The filtering capacitor is arranged on the bottom layer of the television main board PCB. The power supply ground ends of the operation amplifier IC are firstly electrically connected with one pole of the filtering capacitor, and then electrically connected with the main board ground of the television main board PCB though one pole of the filtering capacitor. The power supply input ends of the operation amplifier IC are electrically connected with the other pole of the filtering capacitor. The peripheral areas of the wires electrically connected between the power supply ground ends of the operation amplifier IC and one pole of the filtering capacitor are not covered by copper layers. According to the invention, the connection distance between the operation amplifier IC and the filtering capacitor of the television main board PCB is the shortest, the power supply ground ends of the operation amplifier IC and one pole of the filtering capacitor are connected with the main board ground of the television main board PCB together, a single-point loop mode is formed since the wired areas between the power supply ground ends of the operation amplifier IC and one pole of the filtering capacitor are not covered by the copper layers, and audio and video signals containing TDMA noises are directly sent to the filtering capacitor to be effectively filtered.

Description

technical field [0001] The invention relates to television technology, in particular to a technology for reducing mobile phone TDMA noise, in particular to a TV main board PCB and a method for suppressing TDMA noise. Background technique [0002] With the improvement of mobile phone hardware configuration, the functions of mobile phones are also increasing. Especially with the rise of smart phones, the audio and video processing functions of mobile phones have been greatly improved. However, the TDMA noise generated by mobile phones also brings users Here comes trouble. Many mobile phones now have YPbPr video and audio output functions, and can play video and audio on the mobile phone when connected to a TV with a YPbPr input; such as an Apple mobile phone iPhone, which can be directly connected to the YPbPr input and audio input of the TV through an appledock cable , Play the video files in the iphone on the TV screen. When the mobile phone has voice access, the TV screen ...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of mobile phone hardware configuration, the functions of mobile phones are also increasing. Especially with the rise of smart phones, the audio and video processing functions of mobile phones have been greatly improved. However, the TDMA noise generated by mobile phones also brings users here comes the trouble

Many mobile phones now have YPbPr video and audio output functions, and can play video and audio on the mobile phone when connected to a TV with a YPbPr input; such as an Apple mobile phone iPhone, which can be directly connected to the YPbPr input and audio input of the TV through an appledock cable , to play the video files in the iphone on the TV screen, when the mobile phone has voice access, the TV screen will be disturbed by the TDMA noise of the mobile phone and shake, which will affect the viewing effect

At present, TVs can also suppress TDMA noise interference when audio and video op amps filter audio and video signals. However, in the prior art, the layout of the PCB op amp IC on the TV main board is often on the same layer of the TV main board PCB, and the wiring is too long. The operational amplifier IC is easily interfered by the TDMA signal, resulting in a greatly reduced suppression effect of the operational amplifier IC on TDMA

Moreover, the TV cannot pass Apple's third-party laboratory certification, cannot obtain AppleMFI (madeforiPhone) certification, and cannot meet the performance standards of Apple products

Images