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JFET Input Op Amps | Analog Devices
https://www.analog.com/en/products/amplifiers/operational-amplifiers/jfet-input-op-amps.html
JFET Input Op Amps. Analog Devices JFET input op amps or FastFET™ high speed (>50 MHz) input op amps provide high input impedance and ultralow input bias currents for high speed applications. The majority of our FET input op amps feature wide supply ranges from +5 V to ±12 V or higher and feature rail-to-rail outputs enabling wide dynamic range. Product Selection Table.
EETimes - Op amps in small-signal audio design - Part 4 ...
https://www.eetimes.com/op-amps-in-small-signal-audio-design-part-4-selecting-the-right-op-amp-jfet-input-types-reviewed/
Op-Amps Surveyed: JFET Input Types. Op-amps with JFET inputs tend to have higher voltage noise and lower current noise than BJTinput types, and therefore give a better noise performance with high source resistances. Their very low bias currents often allow circuitry to be simplified. The TL072 Op-Amp.
MUSES03 JFET Input Super Audio Op Amp | Profusion
https://www.profusionplc.com/parts/muses03
Full description. An op-amp for the serious audiophile, the MUSES03 is what happens when you combine a passion for high fidelity audio with New Japan Radio's 50+ years of semiconductor design experience. Taking what they learned with the MUSES01 and MUSES02, The MUSES03 is a single J-FET input, ultra high quality audio operational amplifier that has been optimized for …
New JFET Hifi Op-Amp release! | diyAudio
https://www.diyaudio.com/community/threads/new-jfet-hifi-op-amp-release.94557/
I wanted to see if I could press this 2K170GR JFET Op-Amp to show any distortion, that is worth the name. This was not easy. For a pre amplifier circuit, line level, I think you would agree that the following test is pretty Heavy Duty. Supply is still +/-15 Volt. I use 1 kohm for load. Gain is unity, 1 = buffer. Input = Output: +/-10 V peak.
The Top 10 Operational Amplifiers on SnapEDA – …
https://blog.snapeda.com/2019/10/23/the-top-10-operational-amplifiers/
Audio Compression Amplifier /AGC - ElectroSchematics.com
https://www.electroschematics.com/audio-compressor-agc/
This is an audio compressor/AGC (automatic gain control) with an astonishing 75db input voltage range. A P-Channel JFET is used as a variable resistance element that is applied as a variable attenuator. Distortion is minimized by keeping the signal voltage across the JFET extremely low (1.3mV). This is an improvement over similar circuits that place the …
OK audio gurus: What are the highly regarded FET-input …
https://www.eevblog.com/forum/projects/ok-audio-gurus-what-are-the-highly-regarded-fet-input-op-amps-these-days/
OP, with audio op-amps most EE's are datasheet designers- using a few listed numbers to compare parts. In that regard, a 5532 is all you'll ever need as Douglas Self proclaims. Going beyond the datasheets, even as far back as 1987 it was known op-amps have many important traits not characterised on their datasheets.
LF356 JFET Input Op Amp - Datasheet - Circuits DIY
https://circuits-diy.com/lf356-jfet-input-op-amp-datasheet/
JFET Operational Amplifier JFET (Junction field effect transistor) operational amplifier is a simple electronic configuration that boost up a voltage of lower strength to a higher level. Operational amplifier are usually designed to be used with external feedback components such as resistors and capacitors.
Lowest voltage noise dual JFET op-amp | diyAudio
https://www.diyaudio.com/community/threads/lowest-voltage-noise-dual-jfet-op-amp.180151/
Sounds like you need to use a NE5532 with a pair of discrete dual J-Fet's type 2SK389 (Toshiba) or LSK389 (Linear Systems) and make a hybrid. This should manage < 1nV |/Hz J-fet Dual. Only needs the dual J-Fet and 3 SMD resistors added per op-amp, survivable even in a confined space, SMD versions of Op-Amp and J-Fets are available. Ciao T
AN-32 FET Circuit Applications - Texas Instruments
https://www.ti.com/lit/an/snoa620/snoa620.pdf
Ultra-High Gain Audio Amplifier Sometimes called the ‘‘JFET’’ m amp,’’ this circuit provides a very low power, high gain amplifying function. Since m of a JFET increases as drain current decreases, the lower drain current is, the more gain you get. You do sacrifice input dynamic range with increasing gain, however. 5
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