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MOSFET

The metal"oxide"semiconductor field-effect transistor (MOSFET,MOS-FET,or MOS FET) is a type of transistor used for amplifying or switching electronic signals. Although the MOSFET is a four-terminal device with source (S),gate (G),drain (D),and body (B) terminals,the body (or substrate) of the MOSFET is often connected to the source terminal, making it a three-terminal device like other field-effect transistors. Because these two terminals are normally connected to each other (short-circuited) internally, only three terminals appear in electrical diagrams. The MOSFET is by far the most common transistor in both digital and analog circuits, though the bipolar junction transistor was at one time much more common. The main advantage of a MOSFET transistor over a regular transistor is that it requires very little current to turn on (less than 1mA), while delivering a much higher current to a load (10 to 50A or more). However, the MOSFET requires a higher gate voltage (3-4V) to turn on. In enhancement mode MOSFETs, a voltage drop across the oxide induces a conducting channel between the source and drain contacts via the field effect. The term "enhancement mode" refers to the increase of conductivity with increase in oxide field that adds carriers to the channel, also referred to as the inversion layer. The channel can contain electrons (called an nMOSFET or nMOS), or holes (called a pMOSFET or pMOS), opposite in type to the substrate, so nMOS is made with a p-type substrate, and pMOS with an n-type substrate (see article on semiconductor devices). In the less common depletion mode MOSFET, detailed later on, the channel consists of carriers in a surface impurity layer of opposite type to the substrate, and conductivity is decreased by application of a field that depletes carriers from this surface layer. The "metal" in the name MOSFET is now often a misnomer because the previously metal gate material is now often a layer of polysilicon (polycrystalline silicon).

Transistor > MOSFET

型号	DS	厂牌	批号	数量	地区	采购
BSS123		Fairchild	201006	1563	西班牙	要求报价
BSS123		Fairchild	200106	8813	西班牙	要求报价
BSS123		Fairchild	200917	891	西班牙	要求报价
BSS123		Fairchild	2000+	2895	美国	要求报价
BSS123		Fairchild	2007+	370	美国	要求报价
BSS123		Fairchild	2016+	3000	瑞典	要求报价
BSS123		Fairchild	200833	3003	美国	要求报价
BSS123		Fairchild	-	23	美国	要求报价
BSS123		Fairchild	-	2663	美国	要求报价
BSS123		Fairchild	200309	2402	西班牙	要求报价
BSS123		Fairchild	201029	535	以色列	要求报价
BSS123		Fairchild	-	100	美国	要求报价
BSS123		Fairchild	-	1	美国	要求报价
BSS123		Fairchild	-	3222	英国	要求报价
BSS123		Fairchild	201432	2575	德国	要求报价
BSS123		Fairchild	-	347	美国	要求报价
BSS123		Fairchild	200525	653	美国	要求报价
BSS123		Fairchild	-	757	美国	要求报价
BSS123		Fairchild	200226	450	美国	要求报价
BSS123		Fairchild	200238	1490	美国	要求报价
BSS123		Fairchild	200912	1344	美国	要求报价
BSS123		Fairchild	2003+	175	美国	要求报价
BSS123		Fairchild	200438	1504	美国	要求报价
BSS123		Fairchild	200710	967	美国	要求报价
BSS123		Fairchild	201204	110	美国	要求报价

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