Moyinshi HIFI high-end audio filter card

Introduction: The concept of PC Hi-Fi power filter card was proposed by the Japanese player brand "螞豸声".
Tests have proven that it can effectively improve the output quality of the sound card.
It mainly plays the role of power supply filtering and isolation of ripple interference and
high-frequency noise caused by high-power equipment (such as graphics cards) on the PC Hi-Fi system. It makes up for the shortcomings of the sound card using PC switching power supply.
(PC power supply has always been the shortcoming and drawback of PC Hi-Fi)

"Magic Sound Dies" has been tested, debugged, and re-tested repeatedly. From engineering samples to public beta tests in the "Magic Sound Dies" player Q group, countless capacitor matching schemes have been tested. Finally, in 2011, the official version of "Zhiyuanji" - ZSS-233, was launched. Once launched, it immediately received unanimous recognition and rave reviews from everyone. At the same time, based on the feedback from players, [Demon Sound] further optimized the capacitor matching scheme. In 2012, ZSS-233 LowB was launched. With the encouragement and suggestions of enthusiast players, [Death of Magic Sound] was no longer satisfied with optimizing the capacitor matching scheme. After a long period of time comparison and in-depth research, it added 4 groups of button capacitor ladder arrays with different capacities to further optimize The wiring and grounding mode was launched in November 2019.

We conduct very scientific and rigorous calculations to achieve π-shaped filtering based on PCB-board capacitor-PCB

Compared with the modules on Taobao,

Just being connected is enough, and due to the first layer of ruby ​​capacitor, the dielectric constant of the power supply has a voltage bias effect, which is very unfriendly to the switching frequency of the capacitor, resulting in an increase in the ESR of the inductor.

This will increase the loss of the audio signal in the capacitor, which is not conducive to the frequency division of the signal by the safety capacitor.

As we all know, the computer power supply is a flyBoost architecture, and the parasitic capacitance generated by the common-mode inductor on the fly side will cause the audio frequency division to produce an eye pattern effect.

The 50hz AC signal generated by the onboard graphics card on the motherboard is not conducive to the work of the IP6505 on the motherboard, so we only need to use

The shielding effect of ceramic capacitors is used to physically shield the above interference signals---without any electrical connection.

Therefore, the multimeter measured that the positive terminal of the capacitor on our filter card is not connected to the audio chip on your motherboard.

Since before the computer is turned on, the 12V 3V3 power supply except the AUX suffix has no output, so our capacitor is 0V

After powering on, the computer power supply will send a 220V AC signal to the CPU to indicate that the power supply is working OK. At this time, our capacitor has a large capacity of 0V.

The power generated by the computer power supply will be transmitted to our Magic Sound Filter card immediately. At this time, no circuits on the motherboard are powered on.

After passing through our π-shaped filter, the electric energy can gradually be supplied to the motherboard and other devices, which realizes our filtering

At the same time, due to the external voltage and current loop for 12V 3V3, our PCB is equivalent to generating a real-time simulation based on the computer power ripple

After being chopped by the onboard LED, the thyristor in the ceramic capacitor performs impedance matching to the differential pin on the PCIE

Thereby improving the stability of the motherboard differential signal,

Almost all audio chips on the motherboard interact with the south bridge in the form of IIC, so the stability of the differential signal poses a challenge to the anti-static performance of the chassis.

The audio signal always works in a low-voltage environment, and the naturally output audio signal is pure and natural.

HIFI is a must-have for people with epilepsy!

that's all

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