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ultra-low noise transistors. - diyAudio
https://www.diyaudio.com/community/threads/ultra-low-noise-transistors.17285/
If you are looking for ultra low voltage noise (2 ohm base resistance), BFG16A (SOT223A) or BFQ17 (SOT89) might be interesting. Mind you, hFE is not very high and as far as I remember the 1/f corner is not particularly low, so these are not the right transistors if you want low current noise. See www.semiconductors.philips.com for more info.
Ultra low noise amplifiers - JanasCard
http://www.janascard.cz/PDF/Design%20of%20ultra%20low%20noise%20amplifiers.pdf
says that the lowest noise transistors are ZTX851/ZTX951 with rbb 1.7/1.2 , another choice is ZTX(FMMT)618/718 with rbb 9.3/7.3 with higher β, and many others. [6] is an excellent source of valuable information about analogue design – I highly …
Low Noise Audio Amplifier Transistors | Products ...
https://www.globalspec.com/industrial-directory/low_noise_audio_amplifier_transistors
Description: The LSK170 Single, Low Noise, Low Capacitance, High Input Impedance, N-Channel JFET Amplifier is a direct replacement for Toshiba 2SK170. It is ideal for Ultra Low Noise Audio/Acoustic Applications. Available in TO-92 3L ROHS, SOT-23 3L, ROHS, and Package Type: TO-92, SOT23; Polarity: N-Channel; Transistor Type: JFET
Search results for: low noise Transistors – Mouser
https://www.mouser.com/c/semiconductors/discrete-semiconductors/transistors/?q=low%20noise
Bipolar Transistors - BJT Low Noise,Matched Dual NPN Transistor Enlarge Mfr. Part # SSM2212RZ. Mouser Part # 584-SSM2212RZ. Analog Devices: Bipolar Transistors - BJT Low Noise,Matched Dual NPN Transistor. Learn More. Datasheet. 31 In Stock. 3,326 On Order View Dates. Alternative Packaging ...
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