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JFET-transistors - calvins-audio-pages
https://calvins-audio-page.jimdofree.com/ideas-and-circuits/transistors/jfet-transistors/
JFET-transistors. N-JFET, basic. JFETs can be described as 3-electrodes, depletion-mode, voltage-controlled current sources. The electrodes are the control-input ´Gate´, the high-ohmic ´Drain´ and the low-ohmic ´Source´. A small change in Gate voltage controls a large change of Drain/Source current. The ratio of Ugs to Id is called the ...
Simple JFET Audio Preamps - Ciphers By Ritter
http://www.ciphersbyritter.com/RADELECT/PREJFET/JFETPRE.HTM
The N-JFET Audio Preamp Schematic. The input transistor Q2 is an N-channel JFET. Each particular JFET sets a particular output bias voltage, so the JFET must be selected from among multiple devices for the desired bias value. Fortunately, due to the low current involved, desirable devices can come from a wide range of device types.
JFETs: The New Frontier, Part 1 | audioXpress
https://audioxpress.com/article/JFETs-The-New-Frontier-Part-1
The junction field-effect transistor, or JFET, consists of a channel of semiconducting material through which a current flows. This channel acts as a resistor, and the current through it is controlled by a voltage (electric field) applied to its gate. The gate is a pn junction junction, formed along the channel.
An All-JFET Amplifier: Exploring Modern JFETs Circuits ...
https://audioxpress.com/article/an-all-jfet-amplifier-exploring-modern-jfets-circuits
JFETs and MOSFETs
https://www.sound-au.com/articles/fet-applications.htm
2 - Parameter Spread. One of the less endearing attributes of JFETs is their parameter spread. The I DSS (drain-source current, gate shorted to source) can vary widely, typically with a 5:1 ratio. This means that the same type of JFET could have an I DSS ranging from 1-5mA, with some having an even wider range. Even the somewhat revered 2SK170 has a …
Simple JFET Preamp - AUDIO WORKSHOP
https://blog.audioworkshop.org/simple-jfet-preamp/
A JFET preamp for beginners. Simple yet elegant. Low noise. The following is an example for a very simple and high quality JFET preamp. You can use this to amplify a very low signal sources. FET transistors are usually not used independently in preamplifiers. In most of the cases they are paired with bipolar transistors.
JFET - Junction Field Effect Transistor, Basics Explained
https://byjus.com/physics/junction-field-effect-transistor/
JFET or Junction Field Effect Transistor is one of the simplest types of field-effect transistor. Contrary to the Bipolar Junction Transistor, JFETs are voltage-controlled devices. In JFET, the current flow is due to the majority of charge carriers. However, in BJTs, the current flow is due to both minority and majority charge carriers.
Best transistor to use for audio amplifier - Electrical ...
https://electronics.stackexchange.com/questions/97827/best-transistor-to-use-for-audio-amplifier
transistors audio amplifier bjt fet. Share. Cite. Follow asked Jan 27 '14 at 15:58. ellekaie ellekaie. 350 3 3 gold badges 9 9 silver badges 15 15 bronze badges \$\endgroup\$ 3. 4 \$\begingroup\$ "NPN/PNP/JFET/MOSFET" is a funny way to categorize transistors. Both PNP and NPN are BJTs, with complementary polarities.
Simple FET Circuits and Projects - Homemade Circuit …
https://www.homemade-circuits.com/fet-circuits/
Audio power through the FET drain builds up a voltage around R2, and is connected to the full-wave rectifiers by C3. Current from this bridge rectifier configuration flows by means of the meter, to indicate an equivalent reading that is determined by the power of the fed audio signal. ... JFET transistors when used in linear amplifiers are ...
Best sounding transistors - High-End Audio Discussion Forum
https://forum.audiogon.com/discussions/best-sounding-transistors
Generally speaking, a FET type transistor (like JFET or MOSFET) will typically have more of a warm/rich character. FET transistor are usually not precise and require a resistor or pot to balance for DC offset (when used in an input stage). A bipolar transistor will, typically, sound more clean and will generally have lower distortion.
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