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Design of Ultra Low Noise Amplifiers - JanasCard
http://www.janascard.cz/PDF/Design%20of%20ultra%20low%20noise%20amplifiers.pdf
Various types of ultra-low noise amplifiers both for DC and AC signals are described. “Ultra-low noise” here means that voltage noise density is bellow 1 nV/√Hz for AC amplifiers or noise less than 100 nVpp for DC amplifiers. 1. Ultra–low noise AC amplifiers Op amplifiers (OA) are widely used as AC amplifiers. For ultra-low noise amplifiers are
The Design of Low-noise Audio-frequency Amplifiers
http://www.keith-snook.info/Stuff-you-should-read/Faulkner%20-%20The%20design%20of%20Low-noise%20audio%20frequency%20amplifiers.pdf
THE DESIGN OF LOW-NOISE AUDIO-FREQUENCY AMPLIFIERS considering current ratios, without explicitly referring to the magnitudes of the voltages appearing at the amplifier input terminals. A great deal of confusion has arisen over the rela tion between noise figure and input resistance. It should be clear from Fig. 3 that if an amplifier has a
Design of Low Noise Amplifiers - UC Santa Barbara
https://web.ece.ucsb.edu/~long/ece145a/LNAdesign.pdf
ECE145A/ECE218A Design of Low Noise Amplifiers Using ADS to simulate Noise Figure ADS can be used to design low noise amplifiers much in the same way you have already used it for MAG or MSG designs. Noise circles and available gain circles are the tools that give the most guidance on design tradeoffs. Refer to Chap. 4 and Appendices K and
Design an ultra-low-noise S-band amplifier - EDN
https://www.edn.com/design-an-ultra-low-noise-s-band-amplifier/
Engineers often perceive RF-low-noise-amplifier design as a difficult task. Obtaining a low-noise figure with high stable gain can be challenging—even intimidating. However, with the recent evolution of GaAs (gallium-arsenide) heterojunction FETs, you can design amplifiers with a less-than-1-dB noise figure and high stable gain (Reference 1). This …
60 dB Low Noise Audio Amplifier - jensign.com
https://www.jensign.com/60dBLowNoiseAudioAmplifier/index.html
The circuit below is a low noise low distortion 60 dB (Av=1000) gain block that can be used as an audio preamplifier for very low signal or noise measurements. A high performance LM4562NA dual op-amp is used. Each half of the op-amp uses a different circuit to demonstrate different usage. (The circuit could be easily duplicated in each half of the dual circuit for stereo …
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
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