Impedance Converter Amplifier - Circuit Analysis

Gregory explains the working principles of an Impedance Converter Amplifier, from an HP 334A Distortion Analyzer.
The amplifier uses positive feedback heavily, to increase open-loop gain and to linearize the input impedance.
Full negative feedback locks the closed-gain at unity, cleaning the heavy non-linear effects of transistor amplification.
My video about nonlinear circuits and harmonic distortion
• Distortion and Nonline...
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00:18 - Introduction
01:56 - Impedance Converter Amplifier
03:52 - Circuit analysis technique
05:32 - Positive feedback bootstrapping
09:02 - Input protection parasitic capacitances
11:28 - Negative feedback
Reference:
www.pascalchour.fr/ressources...

[@AllElectronicsChannel]

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[@danstiurca7963]

Excellent analysis!
Great video and great circuit.

[@AllElectronicsChannel]

Glad you liked it!

[@steniomedeiros6709]

Fantastic video! It was a great idea to study renowned equipment blocks and thus inspire our own projects with mastery of the technique. A big hug.

[@AllElectronicsChannel]

Glad you enjoyed it!

[@googlem7]

Very good explanation 👍

[@LousyPainter]

Great video! I'm very curious about the purely negative bias.

[@AllElectronicsChannel]

You and me both!

[@drdoc124]

Thanks for introducing me to impedance converters

[@DoktorJeep]

Analog was the apex of technology

[@misterjorous]

Genial o video. Esse tipo de conteúdo é super raro de ver por aí.
Eu adoro análise de circuitos, principalmente em microelectrônica.
Parabéns pelo vídeo.
A espera de mais videos assim.
Abraço

[@CBtronica]

Excellent explanation!
The HP 3400a true RMS voltmeter also has a similar circuit at the input, but instead a JFET, It uses a Nuvistor tube with a BJT and is more relaxed about linearity, once a higher distortion factor will not degrade the measurement for a rms voltmeter with ±1% accuracy.

[@AllElectronicsChannel]

Thanks for the info!

[@andersonnobre5163]

Perfect english! Thank you my dear Greg. Parabens pelo video em ingles!

[@AllElectronicsChannel]

Thank you! 😃

[@igorb4650]

Whow, so much moving parts in this design!

[@AllElectronicsChannel]

Yep!!

[@vmiguel1988]

Your English is getting way better Greg

[@AllElectronicsChannel]

thanks!

[@kolirock4836]

Hi sir I want to make a uav and want to add a small x band radar for that I need your help for design the radar please

[@toluxtondz6214]

I have a transmitter of 2 watts. What are the electronic components that he replaced in order for his power to be greater

[@garygranato9164]

could the negative supply be because some transistor create less distortion when operating in inverting mode ??? (noob question)

[@Abdullahkhan-lk5zl]

Hello everyone,
I have a question why is there a resistor before the ground. What is the purpose of that resistor.

[@AllElectronicsChannel]

They are biasing resistors only.