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Cars > tingyuya’s Garage > Blog > Ibuonline mobile phone PCB layout production share audio device


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Ibuonline mobile phone PCB layout production share audio device

By tingyuya

??Ibuonline mobile phone PCB layout production share audio device.

??custom pcb manufacturer ?Along with the mobile phone is increased, but the PCB design, more attention was concentrated on the RF subsystem of audio features, audio circuit is often the most do not pay attention to. However, the audio quality, especially the characteristics and high-fidelity sound quality, has become a high-end mobile phone market, can quickly accept one of the most important points. This paper contains some suggestions, in order to ensure a good layout, no audio quality PCB. circuit board manufacturing companies http://www.ib...ring-Services

??Layout Engineer PCB Ibuonline said today, the mobile phone is the ultimate challenge. Modern mobile phone includes a portable device, in almost all subsystems, such as a variety of RF module ( including mobile phones, short distance wireless transmission ). Can be found, audio, video system, processor, the specific application and answer more and more applications, to increase the I / O layout, there is a conflict of each subsystem requirements.

??In the integrated so many complex subsystems, also contain all reality, radio frequency interference between the subsystems are potential, in addition to consider in such a narrow space, or the mutual influence caused by wiring through to each subsystem operation itself, the problem of the electromagnetic interference, mobile phone PCB engineering knowledge test.

??Therefore, a carefully designed personalized printed circuit board must be capable of changing the positions of the components, to maximize the performance of each component, in order to avoid the interference between different systems. If there is a conflict between each subsystem, the results will inevitably lead to performance degradation.

??The recommended method:

??The customized printed circuit board layout planning ideal should be into different regions in different types of circuit, in order to reduce the interference.

??Using a differential signal, to reduce the noise of the audio components of differential input.

??The use of grounding current isolation, in order to avoid the increase of analog circuit, digital noise current.

??Power audio power amplifier is usually large, which may have their own ground or other reference quality caused negative effects.

??Using the hybrid circuit board. Despite the widespread belief that the mobile phone, radio frequency simulation of the area, but the audio circuit is coupled to the radio frequency range, the sound sound, can be demodulated is true.

??Analog audio signal wiring board is too long. Analog audio cable is too long, follow the digital and RF circuit noise absorption.

??Don't forget the importance of ground loops. Bad grounding can be a serious distortion, noise, crosstalk and noise immunity.

??Digital current loop is interrupted, the best effect of the circular path antenna and the sensor is reduced to the minimum.

This article from: ibuonline circuit board manufacturing companies, cheap pcb manufacture, All Rights Reserved

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