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Using HEXFETs in High Fidelity Audio
https://sound-au.com/articles/hexfet.htm
HEXFETs have a nonlinear transfer curve up to about an amp or two, depending on the device(s) used. this characteristic is the cause for a majority of the THD. When driven with enough current, the device will follow the 'new' linear curve, since it is The lower impedance of the driver stage the better. 2 Fix: HEXFETs like to run hot.
HEXFET-Based Medium Power Amplifier with 65W Output
https://www.eeweb.com/hexfet-based-medium-power-amplifier-with-65w-output/
The objective of the circuit is to create a medium power amplifier based on the functionality of a HEXFET to produce a good quality of sound while providing 65W of power output. BC550 – an NPN general purpose transistor with low current and low voltage used for low noise stages in audio frequency equipment
International Rectifier - IRFB4103 | 200V Single N-Channel ...
http://www.irf.com/part/200V-SINGLE-N-CHANNEL-DIGITAL-AUDIO-HEXFET-POWER-MOSFET-IN-A-TO-220AB-PACKAGE/_/A~IRFB4103
TO-220. Part # IRFB4103PBF. 200V Single N-Channel Digital Audio HEXFET Power MOSFET in a TO-220AB package
HEXFET | Circlotron Audio
https://circlotron.audio/en/taxonomy/term/41
Sorry for the quality but it shows that the amp works
400W RMS Hexfet MOSFET Amp - ePanorama
https://www.epanorama.net/sff/Audio/Circuits/Power_amplifiers-linear/400W%20RMS%20Hexfet%20Mosfet%20Amp.pdf
How to match MOSFETs When using this type of MOSFET in the AV800 amplifier is strongly recommended that the output stage devices be matched. As it has been found that if this is not done then there is
HexFet Amp Based on Philips AH578 and LMK | Page 10 | diyAudio
https://www.diyaudio.com/community/threads/hexfet-amp-based-on-philips-ah578-and-lmk.373773/page-10
This is a "HexFet Amp Based on Philips AH578 and LMK" with 36V supply voltage and single pair FET output. The nickname is Tietze & Schenk BA-50M. The topology was first published in mid 70's by Dr. Tietze and Dr. Schenk as "Breitband Verstärker" i.e. Broadband amplifier (BA), 50W (50), the circuit designed by minek123 (M).
Linear Power Amplifier Using Complementary HEXFETs
http://www.cieri.net/Documenti/Altri%20marchi/International%20Rectifier%20-%20Linear%20Power%20Amplifier%20Using%20Complementary%20HEXFETs%20(AN948).pdf
to the HEXFET Power MOSFETs broken, is 30db, -3db points occurring at 15 Hz and 60kHz. Closed loop curves are shown for amplifier gains of 100 (R7 = 470 ohm) and 20 (R7 = 2.2K ohm). In both instances the curves remain flat to within +1db between 15 Hz and 100kHz with an 8 ohm load. The slew rate of the amplifier, measured with a 2V pk-pk square ...
HEXFET vs MOSFET | difference between HEXFET and …
https://www.rfwireless-world.com/Terminology/HEXFET-vs-MOSFET.html
HEXFET is trademark of power MOSFET developed by International Rectifier. The HEXFET structure is shown in the figure-2. As shown silicon oxide layer between gate and source regions can be punctured by exceeding its dielectric strength. The symbol is same as power MOSFET as shown in the figure-1. It is a voltage controlled power MOSFET device.
IRFI4212H-117P - Infineon Technologies
https://www.infineon.com/cms/en/product/power/mosfet/n-channel/irfi4212h-117p/
Key parameters optimized for Class-D audio amplifier applications. Low R DS (ON), Qg and Qsw. Low Qrr for better THD. Lead-free package. Benefits. Reduces the part count by half and faciliatates PCB layout. Can delivery up to 150W per channel into 4Ω load in half-bridge configuration amplifier. High efficiency and THD.
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