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Designing Bipolar Transistor Audio PreAmplifiers
https://pe2bz.philpem.me.uk/Misc/-%20Audio/-%20Amp/-%20AudioAmpDesignInfo%20$$$/-%20PreAmpDesign-001/Info-101-BipolarPreAMPdesign/bipolamp.htm
Design Guidelines for Bipolar Transistor Audio Preamplifier Circuits: By Mike Martell: N1HFX : Before attempting to design a transistor amplifier circuit, it is necessary to acquaint ourselves with some very important design equations. …
Designing JFET Audio PreAmplifiers
https://pe2bz.philpem.me.uk/Misc/-%20Audio/-%20Amp/-%20AudioAmpDesignInfo%20$$$/-%20PreAmpDesign-001/Info-102-JFET-AudioPreAmp-Design/jfetamp.htm
Designing JFET Audio PreAmplifiers. The Junction Field Effect Transistor (JFET) offers very high input impedance along with very low noise figures. It is very suitable for extremely low level audio applications as in audio preamplifiers. The …
High End Audio - Preamplifier model 3
http://tech.juaneda.com/en/projects/preamp3.html
This preamplifier is my second preamplifier (1995-1998). Design reduce components and price compared with model 2, bipolar transistors replaces input FET, filtering capacitors dramatically reduce. First listening, surprise by missing …
Design of Ultra Low Noise Amplifiers - JanasCard
http://www.janascard.cz/PDF/Design%20of%20ultra%20low%20noise%20amplifiers.pdf
1.1 Ultra-low noise AC amplifiers with bipolar transistors With bipolar transistors, the value for emitter-base voltage noise and base current noise of an ideal transistor can be expressed as follows [1],[2]: en = kT√ 2 qIc, in =√2qIb = √ 2qIc hFE (1) With a real transistor, additional noise source which can be modelled as additional resistor rbb
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
(b) a discussion of the noise parameters of bipolar and junction field effect transistors; and (c) examples of how these principles can be applied in practical circuit design for resistive sources. List of Contents 1. Introduction 2. Noise in Linear Amplifiers 2.1. Signal/noise ratio and noise figure 2.2. Models of noisy amplifiers 2.3.
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