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用戶在結構已經設計完成時，此時如果增加濾波器就會對濾波器結構有特殊的結構尺寸要求。通常濾波器內部電路允許的條件下，用戶可以提出任何的濾波器結構尺寸要求。對于端接方式同樣也不限于樣本中的端接方式，濾波器的端接方式是可以按客戶需求確定的。

When the structure has been designed by the user, if the filter is added at this time, there will be special structural size requirements for the filter structure. Generally, if the internal circuit of the filter allows, the user can put forward any filter structure size requirements. The termination method is also not limited to the termination method in the sample. The termination method of the filter can be determined according to customer requirements.

某些用戶對濾波器的漏電有嚴格的要求，常常要求漏電很小甚至近似為零。例如醫療用設備對漏電流就有著極其苛刻的要求。在濾波器內部電路的設計中，漏電流主要由對地電容的容量來決定。因此，定制低漏電流濾波器時，用戶只需提供漏電流的限值要求，濾波器設計工程師就會根據需求確定合理的對地電容量，設計出滿足客戶需求的低漏電濾波器。

Some users have strict requirements for the leakage of the filter, and often require that the leakage is very small or even close to zero. For example, medical equipment has extremely strict requirements for leakage current. In the design of the internal circuit of the filter, the leakage current is mainly determined by the capacity of the capacitance to the ground. Therefore, when customizing the low leakage current filter, the user only needs to provide the limit requirements of the leakage current, and the filter design engineer will determine the reasonable ground power capacity according to the demand, and design the low leakage filter to meet the customer's needs.

一般在用戶對濾波器提出高耐壓的要求時，濾波器設計工程師就會按需求提高濾波器電容的耐壓等級。提高電容的耐壓等級會有助于提高整個濾波器的耐壓性能。另外，高耐壓的需求還會影響濾波器內部元件布局和絕緣強度，因為高耐壓會要求濾波器內部具有更大的爬電間距和更強的絕緣性能。

Generally, when users require high voltage withstand of the filter, the filter design engineer will improve the voltage withstand level of the filter capacitor as required. Improving the withstand voltage level of the capacitor will help improve the withstand voltage performance of the whole filter. In addition, the demand for high voltage withstand will also affect the layout of internal components and insulation strength of the filter, because high voltage withstand will require greater creepage distance and stronger insulation performance inside the filter.

耐高溫和耐低溫的設計主要是選擇不同溫度氣候等級的元件

The design of high temperature and low temperature resistance is mainly to select components with different temperature and climate grades.

實際上用戶可以并不關心樣本上濾波器的額定電流值，而是直接提出電流需求，濾波器設計工程師則可以很容易地根據需求來選取濾波器電路以及導線的線徑和元件參數和散熱設計。對于大電流設計，濾波器內部的銅損、鐵損和散熱條件就比較關鍵，大電流的需求會不同程度地增加濾波器的體積和成本。

In fact, the user can not care about the rated current of the filter on the sample, but directly put forward the current demand. The filter design engineer can easily select the filter circuit and wire diameter and component parameters and heat dissipation design according to the demand. For the design of large current, the copper loss, iron loss and heat dissipation conditions inside the filter are critical. The demand of large current will increase the volume and cost of the filter to varying degrees.

用戶同樣可以對濾波器的插損性能提出特殊的需求，一般這種需求是，要求濾波器在某些特殊的頻率下達到某個插損值。

Users can also put forward special requirements for the insertion loss performance of the filter. Generally, such requirements require the filter to reach a certain insertion loss value at certain special frequencies.

如果用戶需要濾波器同時具有防浪涌、保險、開關等一些其它功能，濾波器設計工程師會在濾波器內增加一些輔助電路，以完成這種特殊需求的定制濾波器。

If the user needs the filter to have some other functions such as anti-surge, insurance, switch, etc., the filter design engineer will add some auxiliary circuits in the filter to complete the customized filter for this special requirement.