Fayl:Original Abraham-Bloch multivibrator circuit.png
Bu prevyuning hajmi: 800 × 560 piksel. Boshqa oʻlchamlari: 320 × 224 piksel | 640 × 448 piksel | 1 024 × 717 piksel | 1 360 × 952 piksel.
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Inspector
| Taʼrif |
English: The first astable multivibrator circuit, invented by French engineers Henri Abraham and Eugene Bloch, from their 1919 paper. The Abraham-Bloch multivibrator, built with triode vacuum tubes, was the first relaxation oscillator circuit, and the predecessor of the Eccles-Jordan flip-flop widely used in modern digital logic. Abraham called the cross coupled-oscillator a multivibrateur because its square-wave output was rich in harmonic frequencies, unlike the existing sine wave oscillators. The text gives the component values as R1 = R2 = 50 kΩ, r1 = r2 = 75 kΩ, C1 and C2 are 8 pF adjustables. The circuit could oscillate at frequencies up to 50 kHz. |
| Sanasi | |
| Manba | Retrieved February 4, 2014 from Richard Glazebrook 1922 A Dictionary of Applied Physics, Vol. 2: Electricity, MacMillan and Co., New York, p. 633, fig. 8 on Google Books. Credited in source to to H. Abraham, Comptes Rendus, Vol. 168, 1919, p. 1105 |
| Muallif | Henri Abraham |
Litsenziyalash
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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| joriy | 16:54, 2019-yil 13-iyul | | 1 360 × 952 (195 KB) | Dicklyon | better grab from the same source, cleaned up a little |
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