#Jfet meaning full

JFET OperationĪ JFET is a unipolar device, which differs in operation from a bipolar junction transistor.

JFETs are fully compatible with other semiconductor devices, such as standard bipolar transistors, silicon- controlled rectifiers, triacs, and ICs. JFETs are even found in voltage regulators and current limiters. The arrow points outward for a P-channel JFET. The arrow in a schematic symbol for an N- channel JFET points inward. The gate is a control element, while the drain and source provide the same function as the emitter and collector on a bipolar junction transistor. The two types of JFETs include the N-channel and P-channel.Ī JFET, like all FETs, contains a gate (G), drain (D), and source (S). 5And yes to the youngsters out there, this does work.A junction field-effect transistor (JFET) is a simple FET with a PN junction in which output current is controlled by an input voltage. I sometimes like listening to a local ball game using this device. I even use a radio whose amplitude modulated RF envelope (basic AM radio signal) is detected by a razor blade and a wooden pencil (look Ma, no batteries). And yes to the youngsters out there, this does work.

#Jfet meaning full

I have used up my current allocation of dead horse beating.īut I will say for full disclosure that I use and enjoy both tube type, solid state and even some hybrid audio electronics.Īnd I even test SS electronics with vacuum tube test gear and the other way round. There are threads on AK and elsewhere, where someone has asked, what impact on sound quality is there when using a vacuum tube buffer between a SS preamp and SS power amp and a person will correctly say that it will add some noise and distortion, which is correct because no circuit is perfect. The device allows you to connect a high impedance device to a low impedance device.Īs you know there is much debate on AK and elsewhere about this topic (vacuum tube buffers and vacuum tubes added to solid state electronics such as a DAC).

It converts a low input impedance to a high input impedance input, to which can be connected a device with a high impedance output. Just think of it as an impedance converter. The device with the high impedance (the audio source) is supplying the signal to your preamp is is putting out a signal, hence it is an output that is connected to an input, the input of your preamplifier.

It is connecting something that has a high impedance output to an amplifier that has a low input impedance. So your device takes the high impedance output of the audio source and converts it to a low impedance output to connect to the input the amplifier. It should be a high impedance output (a device or audio source) that needs to supply a signal to the low input impedance of the amplifier. 'It allows you to hook up a high impedance input to a low impedance amplifier' It is the output of this device that your are connecting the the amplifier not the input as you stated. Yes it has a high impedance input and a low impedance output.