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Position:IcFull.com » IC Electronic information » Category: 3

IC Electronic information

31. Different media types of chip capacitors What are the characteristics?

In Electronic Infomation Category: 3 | on September 27,2011

NPO (COG): a class of dielectric, is one of the most common characteristics with temperature compensation of monolithic ceramic capacitors. Its filled with media by rubidium, samarium and 31 datasheet and other rare oxides formed. NPO capacitors are capacitance and 31 price and dielectric loss of one of the most stable capacitor. At a temperature from - 55 ~ +125 changes when the capacity is (0 30) ppmrC, capacitance variati...

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3. LED luminous efficiency

In Electronic Infomation Category: 3 | on September 24,2011

LED luminous efficiency is generally referred to as components of the external quantum efficiency, which is the component of the internal quantum efficiency and AD822AR datasheet and the efficiency of the components removed product. The so-called components of the internal quantum efficiency is actually electro-optical conversion efficiency of the component itself, the main characteristics of the component itself, suc...

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30. D / A converter of the main parameters that?

In Electronic Infomation Category: 3 | on September 22,2011

D / A converter of the main parameters are as follows: (1) resolution: refers to the analog output may be effective, usually expressed as D / A converter to suffer total input device can handle the number of bits. (2) Accuracy: is the analog output level with a predetermined desired output value of the deviation between the present measure. (3) Differential nonlinearity error: refers to any ...

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33 ground in the interference in what role?

In Electronic Infomation Category: 3 | on September 14,2011

Electronic equipment grounding is a very important issue. The purpose of the ground there are three: (1) ground so that the whole circuit system in all units of the circuit have a common reference zero potential, protection circuitry stable framed work. (2) to prevent external electromagnetic interference. Chassis ground can accumulate due to electrostatic induction and 33 datasheet and a large number of charg...

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31. Grounded mean? Electronic equipment connected to the ground and the earth have any effect?

In Electronic Infomation Category: 3 | on September 14,2011

Ground is connected to a reference potential point or face the technical act of a good conductor. Its role is to: (1) electronic devices in the circuit to improve the stability of the system work. If electronic equipment connected with the earth, it is relatively certain the earth will show potential, the potential field in the role of outside interference changes, resulting in the circuit syste...

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39 pre-drain FET in the rear clip, why are leakage ID?

In Electronic Infomation Category: 3 | on September 07,2011

When the drain between a source connected to + VDS, the drain from the source of a channel consisting of an N-type semiconductor region produces a lateral potential gradient: zero potential source regions, drain regions for the + VIB, the channel potential from source to drain gradually increased. Different locations in the channel, the channel thickness, the source of the most turbulent thick, dr...

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3. Illumination

In Electronic Infomation Category: 3 | on September 07,2011

The unit was received according to the flux surface is called illumination, the illuminated surface per square meter, if the received flux is 1 Im, then the illumination of 1 lx. According to approach of taking unit: lux (lx). Intense summer sun at noon on the ground illumination about 5000 lx, sunny day in winter when the ground illumination of about 2000 lx, clear moonlit ground illumination of ...

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3 ?D 1 ? 3 ? ? ? ? 2 ? ?? ? ? ? D

In Electronic Infomation Category: 3 | on September 07,2011

??? ? ?? ???? ? y?e ? ? | ? o D? y?e a ?? ? ???? ? ? D ? | ? ? o ? 1 3 ? ? ??? ? ? 3 y? a ? ?DD? ? ? ? ?D a a ? ?1 | ? ???? ? ???D? ? D ? ? ? ? ? ???D ? ?2 ? ?? 2 ? ????? ? ??3? ? D ???D? 1 ?? ? ? | ? ? ? ? o ? ? 3 ? a ? ? ? ?? ? ? ? 3 ?? ? D ? ? ? ?? ?? ? ??3o D 3 ? ?? ? ? ??? e? ? ? D ? ? ? ? ? ? ? ??? ? D o 2 ? ??? ??? ? ??? a ? 1? ? ? ? ? ? ? ...

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34. How to configure the decoupling capacitors?

In Electronic Infomation Category: 3 | on September 06,2011

Decoupling capacitor configuration may play a role in immunity, its configuration to the following points: (1) If a meter in a number of block logic board, power supply and 34 datasheet and ground are usually The introduction is too near, and 34 price and then a capacitor (10 ~ 100 pF) and 34 suppliers and a ceramic capacitor (O.01 ~ Ol r / F), between boards to prevent mutual interference. (2) - as should the PCB of each IC power input is...

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35. Often see the clock / data line / address line a small series, what does it do?

In Electronic Infomation Category: 3 | on August 31,2011

This resistor has two effects: first impedance matching. Because the signal source impedance is very low, with the impedance mismatch between the signal line, in series with a resistor, can improve the match, so as to reduce reflection, to avoid oscillation and 35 datasheet and so on. Second, it could reduce the extent of the steep edge of the signal, thus reducing high frequency noise and 35 price and overshoot, etc. Becaus...

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