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  2. Mobile phone accessories - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_accessories

    Leather cases; Cases with integrated kick stands; Battery cases; Cases with protection devices; Holsters are commonly used as third-party cases for devices, and/or are made of plastic and without exposed rigid corners. Heavy duty cases are designed to protect from drops and scratches. A standing (or kickstand) case keeps the device standing ...

  3. Trimline telephone - Wikipedia

    en.wikipedia.org/wiki/Trimline_telephone

    A 220 Trimline rotary desk phone, showing the innovative rotary dial with moving fingerstop Early Touch Tone Trimline with round buttons and clear plastic backplate and round non-modular handset cord Redesigned touch-tone desk model Trimline, manufactured on January 9, 1985 The Trimline 2225, one of the last phones made at the Indianapolis Works in 1986 Early foreign made Trimline, December ...

  4. Automatic gain control - Wikipedia

    en.wikipedia.org/wiki/Automatic_gain_control

    Schematic of an AGC used in the analog telephone network; the feedback from output level to gain is effected via a Vactrol resistive opto-isolator.. Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input.

  5. Nivelles-Baulers - Wikipedia

    en.wikipedia.org/wiki/Nivelles-Baulers

    Nivelles-Baulers was a 2.314 mi (3.724 km) ... This page was last edited on 20 January 2024, ... Contact Wikipedia; Code of Conduct;

  6. Robert Nivelle - Wikipedia

    en.wikipedia.org/wiki/Robert_Nivelle

    Robert Georges Nivelle [a] (15 October 1856 [1] – 22 March 1924 [2]) was a French artillery general officer who served in the Boxer Rebellion and the First World War.In May 1916, he succeeded Philippe Pétain as commander of the French Second Army in the Battle of Verdun, leading counter-offensives that rolled back the German forces in late 1916. [3]

  7. Low-noise amplifier - Wikipedia

    en.wikipedia.org/wiki/Low-noise_amplifier

    A low-noise amplifier (LNA) is an electronic component that amplifies a very low-power signal without significantly degrading its signal-to-noise ratio (SNR). Any electronic amplifier will increase the power of both the signal and the noise present at its input, but the amplifier will also introduce some additional noise.

  8. Timeline of the telephone - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_telephone

    20 March 1880: National Bell Telephone merges with others to form the American Bell Telephone Company. 1 April 1880: world's first wireless telephone call on Bell and Tainter's photophone (distant precursor to fiber-optic communications) from the Franklin School in Washington, D.C. to the window of Bell's laboratory, 213 meters away. [20] [21]

  9. Brabant killers - Wikipedia

    en.wikipedia.org/wiki/Brabant_killers

    Two riot guns (possibly Winchester 1200s and/or a Franchi SPAS 12 [1] [2] One .45 Ingram MAC 10 submachine gun [3] One MP5SD5 [4] 7.65mm Ortgies Semi-Automatic Pistol: Deaths: 28 (including a Belgian communal policeman and a gendarme) Injured: 22 (including 2 French gendarmes, 2 Belgian communal police officers, and a Belgian gendarme) Perpetrators