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  2. File:Preselector, Wiring diagram of a simple radio circuit.png

    en.wikipedia.org/wiki/File:Preselector,_Wiring...

    This circuit diagram shows the interconnections of parts for a very basic preselector which goes between and antenna and a radio. Source Drawn using free software by me using a well known circuit Date 2014-10-29 Author JNRSTANLEY. Permission (Reusing this file) See below.

  3. Radio receiver design - Wikipedia

    en.wikipedia.org/wiki/Radio_receiver_design

    A schematic of a superhet AM receiver. Note that the radio includes an AGC loop in order to maintain the RF and IF stages in their linear region, and to produce an audio output not dependent on the signal power received. Here we show block diagrams for typical superheterodyne receivers for AM and FM broadcast respectively.

  4. List of free electronics circuit simulators - Wikipedia

    en.wikipedia.org/wiki/List_of_free_electronics...

    List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE. The following table is split into two groups based on whether it has a graphical visual interface or not.

  5. Envelope detector - Wikipedia

    en.wikipedia.org/wiki/Envelope_detector

    The resistor and capacitor form a 1st-order low pass filter, which attenuates higher frequencies at a rate of -6 dB per octave above its cutoff frequency of . The filter's RC time constant ( τ = R C ) {\displaystyle (\tau {=}RC)} must be small enough to track quickly-falling envelope slopes and "top up" the envelope's voltage every peak to ...

  6. Amplitude modulation - Wikipedia

    en.wikipedia.org/wiki/Amplitude_modulation

    Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave.In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal.

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  8. Schematic editor - Wikipedia

    en.wikipedia.org/wiki/Schematic_editor

    A schematic editor is a tool for schematic capture of electrical circuits or electronic circuits.. Schematic editors replaced manual drawing of schematic diagrams, but they still retain the capability of outputting schematics on specially formatted sheets.

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