File:Original Abraham-Bloch multivibrator circuit.png
Size of this preview: 800 × 560 pixels. Other resolutions: 320 × 224 pixels | 640 × 448 pixels | 1,024 × 717 pixels | 1,360 × 952 pixels.
Original file (1,360 × 952 pixels, file size: 195 KB, MIME type: image/png)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
This section is not coming and in 2000 2007 into imo and contacts masons lessons of mine and number in speak and speak and international problem of company naka it is no coming 333 111. 128+38.3=56886
Inspector
| Description |
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. |
| Date | |
| Source | 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 |
| Author | Henri Abraham |
Licensing
 |
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.
|
 |
 |
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
|
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:54, 13 July 2019 | | 1,360 × 952 (195 KB) | Dicklyon | better grab from the same source, cleaned up a little |
| 08:32, 6 February 2014 |  | 382 × 241 (5 KB) | Chetvorno | User created page with UploadWizard |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on fa.wikipedia.org
- Usage on ru.wikipedia.org
- Usage on uz.wikipedia.org
