A voltage or current applied to one pair of the transistors terminals controls the current through another pair of terminals. Motorola, alldatasheet, datasheet, datasheet search site for electronic components and. Octopart is the worlds source for mpf102 availability, pricing. Jfet amplifiers worksheet discrete semiconductor devices. It works at much higher frequencies than the typical af jfets or the low rf jfets like mpf102, and can sustain higher voltage 30v making it more desirable for af applications as ccs. My local radio shack store quit stocking my favorite jfets, the mpf102 and 2n3819. A pnjunction is formed on one or both sides of the channel, or surrounding it, using a region. General purpose nchannel junction field effect transistor.
It would be considerate of the seller to put out a folder with all the spec sheets so we dont each have to. Linear operation of the transistor under the smallsignal condition. Sep 09, 20 make sure c3 is near the coil and the entire three jfet circuit is compact. A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. Fieldeffect transistors control the current between source and drain connections by a voltage applied between the gate and source. Fairchild, alldatasheet, datasheet, datasheet search site for electronic components and. Junction field effect transistor jfet the single channel junction fieldeffect transistor jfet is probably the simplest transistor available.
Mpf102, mpf102 datasheet, mpf102 jfet nchannel transistor datasheet, buy mpf102 transistor. Ic cross reference cross reference ci stk cross reference ci tda cross reference ci sharp cross reference hitachi audio ic cross reference and circuit applications smd cross reference and equivalent we make every effort to ensure that the material on this site is accurate, however we do not warrant or represent that the information is free. Through the active channel, electric energy will flow from between the source terminal and drain terminal. Again, the minimum is more important than the maximum. Resetting the power supply voltage back where the student began the experiment and replacing the transistor, the student discovers that the biasing potentiometer must be readjusted to achieve good classa operation. Junction field effect transistor junction field effect transistor is one type of fets as a switch that can be controlled electrically. A small signal v be with a triangular waveform is superimpose din the dc voltage v be. Nchannel rf amplifier, mpf102 datasheet, mpf102 circuit, mpf102 data sheet. If you cant find this spec, download the device datasheet. The mechanism of gate control varies in di erent types of fets, e. Technical information motorola semiconductor mpf102 datasheet.
Wholesale vendors dont sell the mpf102 or 2n3819 anymore. Jfet, conociendo las caracteristicas del transistor jfet. Mpf102 datasheet, mpf102 pdf, mpf102 data sheet, mpf102 manual, mpf102 pdf, mpf102, datenblatt, electronics mpf102, alldatasheet, free, datasheet, datasheets, data. Find the best pricing for on semiconductor mpf102 by comparing bulk discounts from 2 distributors. Mpf102 pin out mpf102 application note mpf102d text. B, october 2004 mpf102 absolute maximum ratings ta25c unless otherwise noted these ratings are limiting values above which the serviceability of any semiconductor device may be impaired. Major brands mpf102 transistor jfet n channel 3pin to92 bulk 3. Here are some jfet manufacturers foundries and vendors to check. Mpf102 d mpf102 preferred devices jfet vhf amplifier n. There are two types of fieldeffect transistors, the junction. Free, halogen freebfr free and are rohs compliant maximum ratings rating.
Fet circuit applications an32 national semiconductor application note 32 february 1970 fet circuit applications polycarbonate dielectric tlh67911 sample and hold with offset adjustment the 2n4339 jfet was selected because of its low lgss k100 pa, verylow ldoff k50 pa and low pinchoff voltage. It gives rise to a collector signal current i c, also of triangular waveform, superimposed on the dc current i c. The junction field effect transistor or jfet is widely used in electronics circuits. Channel features drain and source are interchangeable s prefix for automotive and other applications requiring unique site and control change requirements. Description more info in stock package package qty.
Mpf102d mpf102 preferred devices jfet vhf amplifier n. Mpf102 mpf102g package shipping toa 92 unitsbulk toa 92 pba free , mpf102 preferred devices jfet vhf amplifier na channel a depletion features a, diagram mpf 102 ayww g g mpf102 device code a assembly location y year ww work week, llc. The jfet is a long channel of semiconductor material, doped to contain an abundance of positive charge carriers or holes ptype, or of negative carriers or electrons ntype. Mpf102 mpf102 jfet nchannel transistor datasheet futurlec. Mpf102 mixer av rf modulator ic data book free download 2n2222a plastic. If youre putting together an allpurpose electronics kit, this is a great bundle to have.
Q101 qualified and ppap capable these devices are pb. Jfets are threeterminal semiconductor devices that can be used as electronicallycontrolled switches, amplifiers, or voltagecontrolled resistors unlike bipolar transistors, jfets are exclusively voltagecontrolled in that they do not need a biasing current. Motorola order this document semiconductor technical data by mpf102d jfet vhf amplifier nchannel depletion mpf102 1 drain 3 gate 2 source maximum ratings rating symbol value unit drainsource voltage vds 25 vdc 1 2 3 draingate voltage vdg 25 vdc gatesource voltage vgs 25 vdc case 2904, style 5 gate. Major brands mpf102 transistor jfet n channel 3pin to92 bulk. The mpf102 jfet is a popular nchannel jfet that is commonly used in low power amplifier circuits. When designing a jfet circuit, it is highly recommended to prevent the absolute maximum current from being exceeded under any conditions. Jfet rf jfet transistors are available at mouser electronics. Peak current is ususally about twice the average current. For the first design example, we will use an mpf102 transistor with a. Click the button below to add the transistor fet mpf102 to your wish list. Its less than a nickel a transistor at the list price, and they go on sale sometimes too. The first highfrequency transistor was the surfacebarrier germanium transistor developed by philco in 1953, capable of operating up to 60 mhz. Electronics component datasheets fet, jfet, mosfet etc.
It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. Semiconductor transistor, diode, ic cross reference. The mpf102 is a nchannel jfet transistor in a to92 package. Mpf1022motorola smallsignal transistors, fets and diodes device datapower gain2. Semiconductortransistor crossreference list peavey. J23548 k24123 i3940i nz3766 53c03 siliconix fet transistor e112 fet nchannel jfet transistor replacement guide j201 e112 jfet jfet bfw10 terminals jfet bfw10 specifications 4856a mosfet transistor e112 fet fets in balanced mixers ed oxner equivalent components fet bfw10. The jfet is no longer in production and finding it might be difficult. A ptype material is added to the ntype substrate in nchannel fet, whereas an ntype material is added to the ptype substrate in pchannel fet. Mpf102 datasheet78 pages motorola jfet vhf amplifier. Motorola order this document semiconductor technical data by mpf102 d jfet vhf amplifier nchannel depletion mpf102 1 drain 3 gate 2 source maximum ratings rating symbol value unit drainsource voltage vds 25 vdc 1 2 3 draingate voltage vdg 25 vdc gatesource voltage vgs 25 vdc case 2904, style 5 gate current ig 10 madc to92. Need to know if the part can handle the frequency or give you the gain you need, look at the data sheet.
Remembering that the controlled current in a jfet flows between source and drain, we substitute the source and drain connections of a jfet for the two ends of the switch in the. The junction fieldeffect transistor jfet as a switch. Onsemi, alldatasheet, datasheet, datasheet search site for electronic components and. Minimum i dss can be less than 2, but must not be greater than 2. Transistor e112 fet nchannel jfet transistor replacement guide j201 e112 jfet jfet bfw10 terminals jfet bfw10 specifications 4856a mosfet transistor e112 fet fets in balanced mixers ed oxner equivalent components fet bfw10 text. Field effect transistors in theory and practice application note. Mpf102 pin out mpf102 application note mpf102 d text. Mpf102 to92 nchannel rf amplifier this device is designed for electronic switching applications such as. Nov 12, 2006 after a while the radio went dead, hmm, ok only active components were that fet a 2n2222a transistor and a lm386 amp chip, i started checking voltages, there was a debuging section of the pdf manual, on second or third touch of the probe i found that no signal was comming from the preamp, hmm, ok my only mpf102 was likely dead. Motorola smallsignal transistors, fets and diodes device data. Trask, jfet transistor evaluation 5 4 december 2008 fig. Mpf102 mpf102 jfet mpf102 transistor mpf102 jfet data sheet mpf102 application note mpf102 circuit application. These days, neither fairchild nor siliconix manufactures these jfets.
Fets can be used for analog and digital applications. Ohmic contacts at each end form the source s and the drain d. Jun 09, 2016 the operating characteristics of a transistor are all found on its data sheet. A fielde ect transistor fet has a gate g terminal which controls the. Mpf102 datasheet28 pages motorola jfet vhf amplifier. Lets begin our investigation of the jfet as a switch with our familiar switchlamp circuit. The on semiconductor datasheet for the mpf102 does not specify a pinchoff voltage, but the fairchild datasheet says the pinchoff voltage can be as high as 8 volts. Like its bipolar cousin, the fieldeffect transistor may be used as an onoff switch controlling electrical power to a load. Mpf102 datasheet18 pages motorola jfet vhf amplifier. The types of jfet are nchannel fet and pchannel fet.
The jfet is abbreviated as junction field effect transistor. Mpf102 equivalent transistor mpf102 jfet mpf102 fet 2n4221. Mpf1027motorola smallsignal transistors, fets and diodes device data0350340330 datasheet search, datasheets, datasheet search site for electronic components and semiconductors, integrated circuits, diodes and other semiconductors. Go to the vendors catalog page for the jfet type that you want to investigate. Jfets are lowpower devices with a very high input resistance and invariably operate in the depletion mode, i. Mpf102 cross reference electronic circuits, tv schematics. Datasheet identification product status definition advance information formative or in design this datasheet contains the design specifications for product development. I c g m v be, where g m is the slope of the i cv be curve at the bias point q. Nte electronics nte457 nchannel silicon jfet transistor for general purpose amplifier and switch, 25v, 15ma fairchild semiconductor j112. An evaluation of junction fieldeffect transistors suitable. Check the gatetosource voltages, the sources should be a couple of volts more positive than the gates.
The single channel junction fieldeffect transistor jfet is probably the simplest transistor available. The maximum i dss must exceed your circuits peak drain current. In a junction fieldeffect transistor jfet, there is a pn junction between the gate and source which is normally reversebiased for control of sourcedrain current. Figure 2 lists the basic characteristics of these two devices this months article looks at basic usage information and applications of jfets. The junction field effect transistor is a reliable and useful electronic component that can be used very easily in a variety of electronic circuits ranging from jfet amplifiers to jfet switch circuits. Jfet junction field effect transistor electronics notes. Hilitchi 24values 2n2222s9018 bc327bc558 npn pnp power. Octopart is the worlds source for mpf102 availability, pricing, and technical specs and other electronic parts. Most jfets are nchannel rather than pchannel devices.
Two of the oldest and best known nchannel jfets are the 2n3819 and the mpf102, which are usually housed in to92 plastic packages with the connections shown in figure 1. These were made by etching depressions into an ntype germanium base from both sides with jets of indiumiii sulfate until it was a few tenthousandths of an inch thick. Mpf102 jfet n channel transistor tayda electronics. The junction gate fieldeffect transistor jfet is one of the simplest types of fieldeffect transistor. Later, the student accidently adjusts the power supply voltage to a level beyond the jfets rating, destroying the transistor. It would be considerate of the seller to put out a folder with all the spec sheets so we dont each have to spend an hour googling and downloading. In each case, the fact that the gate is used to control current ow between s and d plays a crucial role. Last months opening episode explained among other things the basic operating principles of jfets.
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