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JFE150 Ultra-Low-Noise, Low-Gate-Current, Audio, N …
https://www.ti.com/lit/gpn/JFE150
JFE150 Ultra-Low-Noise, Low-Gate-Current, Audio, N-Channel JFET 1 Features • Ultra-low noise: – Voltage noise: • 0.8 nV/√Hz at 1 kHz, IDS = 5 mA • 0.9 nV/√Hz at 1 kHz, IDS = 2 mA – Current noise: 1.8 fA/√Hz at 1 kHz • Low gate current: 10 pA (max) • Low input capacitance: 24 pF at VDS = …
Linear Systems Ultra-Low-Noise JFETs
https://www.linearsystems.com/product-spotlight.html
Linear Systems Ultra-Low-Noise JFETs. Linear Systems presents a full line of single, dual, N-Channel and P-Channel ultra-low-noise JFETs to create low-noise, high-performance applications ranging from sensors to audio amplifiers. Members of the company’s design and production staff each have over 40 years’ experience making these parts, and as a group they are the most …
OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, …
https://www.ti.com/lit/ds/symlink/opa1656.pdf
OPA165x Ultra-Low-Noise, Low-Distortion, FET-Input, Burr-Brown™ Audio Operational Amplifiers 1 Features • Ultra-low noise: – Voltage noise: 2.9 nV/√Hz at 10 kHz – Current noise: 6 fA/√Hz at 1 kHz • Low distortion: – 0.000029% (–131 dB) at 1 kHz – 0.000035% (–129 dB) at 20 kHz • High open-loop gain: 150 dB • High output current: 100 mA • Low input bias current: 10 pA
LSK489 Application Note - CordellAudio.com
https://cordellaudio.com/JFETs/LSK489appnote.pdf
to microphone preamplifiers, the use of a low-noise, high-impedance device between the input and the op amp is needed in order to optimize performance. At first glance, one of Linear Systems’ most popular parts, the LSK389 ultra-low-noise dual JFET would appear to be a good choice for such an application. The part’s high input
Low Noise High Gain - JFET - InterFET
https://www.interfet.com/low-noise-high-gain/
A very low-noise FET input amplifier - NIST
https://tf.nist.gov/general/pdf/821.pdf
A low-noise amplifier has been designed utilizing a Toshiba 2SK117 N channel J-FET' as the input device in a cascode' configuration. Noise measurements on this amplifier yield a low-frequency noise current of 0.25 fA/m and a voltage noise of less than 1.2 nV/m in the 500 Hz to 500 kHz region. Bloyet, Lepaisant, and Varoquaux3 suggest a figure
Lowest Noise JFETs? - diyAudio
https://www.diyaudio.com/community/threads/lowest-noise-jfets.317639/
The BF862 was a lucky find for an audio transistor. Very high gain; fairly low capacitances; and low noise. The low noise was a surprising gift. The device was intended for, and spec'd for, preamplifiers in the MF to HF range. A JFET that is low noise at RF frequencies isn't necessarily low noise at audio frequencies.
Ultra low noise amplifiers - JanasCard
http://www.janascard.cz/PDF/Design%20of%20ultra%20low%20noise%20amplifiers.pdf
An ultra-low noise amplifier with FET. Matching of single transistors is more difficult than with bipolar due to wider spread of Idss between JFETs, so it is usually simpler to set DC bias point for every transistor separately and use AC feedback only as shown in Fig 4. A drawback of no DC feedback is worse bias point
LSK170 Single, N-Channel JFET - Linear Integrated Systems
https://www.linearsystems.com/lsnews/lnjfet.html
LINEAR INTEGRATED SYSTEMS NEW ULTRA LOW NOISE JFETs TARGET AUDIO, INSTRUMENTATION, MEDICAL AND SENSORS. LSK170 SERIES DELIVERS DIRECT PIN FOR PIN REPLACEMENT OF TOSHIBA'S 2SK170. FREMONT, Calif. January 25, 2005 Linear Integrated Systems, a leading full-service manufacturer of specialty linear semiconductors, announces the …
Simple JFET Audio Preamps - Ciphers By Ritter
http://www.ciphersbyritter.com/RADELECT/PREJFET/JFETPRE.HTM
The low operating current allows the JFET gate to operate at a bias voltage much lower than the specified "Gate-Source Cutoff Voltage," thus making a wide range of devices usable. The best JFET current for lowest noise can easily be checked …
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