Results 261 to 270 of about 126,658 (301)
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Pulse-code-modulation exchange switching
Proceedings of the Institution of Electrical Engineers, 1972The large and increasing quantity of pulse-code-modulation (p.c.m.) transmission circuits being installed in the national network means that the exchanges of the future will have to switch p.c.m. as well as analogue circuits. The paper analyses the problem of p.c.m.
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A transistorized pulse code modulator
Transactions of the I.R.E. Professional Group on Electronic Computers, 1954A pulse code modulator is described in which transistors are the only active circuit components. The functions of quantizing and encoding the signal are performed entirely by semiconductor diodes, using transistor amplifiers where necessary to increase the signal level.
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Sampling and Pulse Code Modulation
1982In the previous three chapters, we have discussed the modulation of a sinusoidal carrier of a suitably high frequency by means of an analogue baseband-signal such as a speech or music waveform. The object of modulation was primarily to achieve a relocation of baseband information at a carrier frequency that was suitable for electromagnetic propagation.
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Pulse-Code-Modulation und Zeitmultiplex
2002Die Pulse-Code-Modulation (PCM) ist das Standardverfahren zur Digitalisierung von Sprach- und Audio-Signalen. Die theoretischen Grundlagen liefert die Systemtheorie mit dem Abtasttheorem und den Aussagen zur Quantisierung. Die wirtschaftlichen Voraussetzungen fur den Einsatz von PCM in der Telephonie liefert das ISDN und umgekehrt.
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The tubulin code and its role in controlling microtubule properties and functions
Nature Reviews Molecular Cell Biology, 2020Carsten Janke, Maria M Magiera
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Genetic code flexibility in microorganisms: novel mechanisms and impact on physiology
Nature Reviews Microbiology, 2015Jiqiang Ling +2 more
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Is there a code embedded in proteins that is based on post-translational modifications?
Nature Reviews Molecular Cell Biology, 2008Danny Reinberg
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