JFET Stands in For Triode in This Infinite Impedance Detector https://hackaday.com/2023/02/10/jfet-stands-in-for-triode-in-this-infinite-impedance-detector/ #thermionicemission #demodulation #RadioHacks #detector #triode #jfet #am #IF #RF

JFET Stands in For Triode in This Infinite Impedance Detector - An “Infinite Impedance Detector” might sound a little like something that [Zaphod ... - https://hackaday.com/2023/02/10/jfet-stands-in-for-triode-in-this-infinite-impedance-detector/ #thermionicemission #demodulation #radiohacks #detector #triode #jfet #am #if #rf

JFET Source follower with constant current source. You have to keep an eye on J2 so that the JFET will be able do drive constant current, depending on R1+R2 and you system voltage. Choose the specific JFET wisely (J111/J112/J113).
The amp will have unity gain with vin=vout with good linearity.
#JFET #Amplifier

JFET's are pretty cool little devices. The source follower circuit is especially good as impedance converter. It is a shame that most examples so not feature the circuit with double JFET's where one acts as a current source.
That gives much better linearity but i assume will also reduce low frequency noise. Btw: this is not a voltage amplifier.
Going to build one pretty soon.
#JFET #circuit #amplifier

The new #deWalt interlocking #drillBit cases with clear covers are nice.

Whether these bits are any good on #styrene or #polycarbonate is another matter. The deWalt bits I had were no good (and one set I just got is likely identical to one I had, except for the case).

I don’t do much HW stuff, but sometimes am drilling into thing to house hokey little #electronics projects (such as my #JFET #opAmp continuity detector for making sure I didn’t screw up the connections in the next version).

Practical Transistors: JFETs

https://hackaday.com/2022/06/02/practical-transistors-jfets/

#transistor #MiscHacks #mosfet #jfet

je vais plutôt mettre un 5951 à la place du j111 prévu pour remplacer 5952 du #noisegate pas données ces petits #jfet 3$, mais la component bill est complété