File:Reflex receiver block diagram.svg
Original file (SVG file, nominally 1,402 × 766 pixels, file size: 18 KB)
Captions
Summary
[edit]DescriptionReflex receiver block diagram.svg |
English: Block diagram of a simple reflex radio receiver, an unusual type of radio receiver invented by Marius Latour and William Preiss in 1917 that was used to a limited extent in the 1920s. The distinguishing feature of the reflex circuit is that the amplifier is used to amplify both the radio frequency (RF) and audio frequency (AF) signals at the same time. It functions as a tuned radio frequency (TRF) receiver. The RF signal from the antenna, after passing through the bandpass filter, a tuned circuit which selects the frequency of the station desired, passes through an amplifier consisting of one or more vacuum tubes or transistors, then passes through the high pass filter to the demodulator, which extracts the information bearing modulation (audio) signal from the radio carrier wave. This is fed back and passes through the same amplifier again, which does the audio amplification, passes through the lowpass filter which blocks the RF signal, and is applied to the speaker. Thus the amplifying devices do "double duty", reducing the number of active devices needed. The economical reflex circuit was used in inexpensive single vacuum tube receivers in the early 1920s, but feedback problems limited its usefulness. |
Date | |
Source | Own work |
Author | Chetvorno |
SVG development InfoField | This diagram was created with Inkscape, or with something else. This diagram uses translateable embedded text. |
Licensing
[edit]This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:20, 17 October 2017 | 1,402 × 766 (18 KB) | Chetvorno (talk | contribs) | Changed color of amplifier from confusing red/blue combination to green | |
02:42, 9 May 2017 | 1,402 × 766 (19 KB) | Chetvorno (talk | contribs) | Replaced invalid Inkscape SVG version with "plain SVG" version which passes validation | ||
10:45, 27 March 2017 | 1,402 × 766 (24 KB) | Chetvorno (talk | contribs) | Changed color of amplifier to half red/half blue indicating that both RF and audio frequencies pass through it | ||
10:16, 7 January 2016 | 1,402 × 766 (23 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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Height | 766.14313 |