File:Tektronix M377 instrumentation amp simplified.png

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(1,975 × 1,177 pixels, file size: 68 KB, MIME type: image/png)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description
Русский: Принцип устройства инструментального усилителя Tektronix M377 (1988 год) - "дифкаскад из двух дифкаскадов" (сильно упрощённо). Каждый "транзистор" представляет собой простейший прецизионный повторитель напряжения; составной, а не простой транзистор его эмиттерного повторителя обеспечивает широкую полосу частот - до 1 ГГц в оригинале (для НЧ и нижних диапазонов РЧ достаточно и обычных транзисторов). Крутизна передаточной характеристики задаётся эмиттерными резисторами Re и практически неизменна во всём диапазоне допустимых входных напряжений. Резисторы оригинальной M377 - прецизионные нихромовые, прошедшие лазерную подгонку на заводе. Быстрый выход из перегрузки обеспечивает не показанный здесь обвес из диодов Шоттки и дополнительных источников балластного тока.
Подробное описание Staric P., Margan E. Wideband Amplifiers. — Springer, 2007. — 630 p. — ISBN 9780387283418. pp. 5.117-5.123 и статья самого разработчика - Addis J. Versatile analogue chip for oscilloscope plug-ins // Electronics Engineering ; 1988 ; № 8. — С. 23—28 ; 1988 ; № 9. — С. 37—43.
English: Input instrumentation amplifier of the Tektronix M377 IC (1988), very very simplified. It is, put simply, a long-tailed pair made not of transistors, but of Schlotzauer-style followers. Each of these 'transistors' has very high transconductance, which is lowered by inclusion of laser-trimmed degeneration resistors between two 'emitters'. This means that (a) transconductance is as constant as nichrome resistors could be, meaning very low distortion (b) balance, offset, offset drift are as good as these resistors: semiconductor thermals are excluded from the equation. A detailed description was published by John Addis in Electronics Engineering, Aug-Sept 1988, and later in Wideband Amplifiers by Staric and Margan (2007).
Date
Source Own work
Author Retired electrician
This work is ineligible for copyright and therefore in the public domain because it consists entirely of information that is common property and contains no original authorship.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current17:48, 1 July 2019Thumbnail for version as of 17:48, 1 July 20191,975 × 1,177 (68 KB)Retired electrician (talk | contribs)added blocks
00:23, 1 July 2019Thumbnail for version as of 00:23, 1 July 20191,910 × 1,139 (69 KB)Retired electrician (talk | contribs){{Information |Description= |Source={{own}} |Date= |Author= Retired electrician |Permission= |other_versions= }}

You cannot overwrite this file.

The following page uses this file:

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Tektronix_M377_instrumentation_amp_simplified.png&oldid=700816418"