поискавой системы для электроныых деталей |
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74LCX04 датащи(PDF) 5 Page - Micrel Semiconductor |
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74LCX04 датащи(HTML) 5 Page - Micrel Semiconductor |
5 / 10 page Micrel TXRX_982_R1 Evaluation Board September 2004 M9999-092304 hbwhelp@micrel.com or (408) 955-1690 5 Laser Response Tuning Overshoot/Undershoot The damping resistors R8 and R24 installed in series with laser are 20 . This value might be tuned to a higher value to minimize or suppress any overshoot or undershoot on the optical signal out of the laser, but keep in mind that higher value damping resistors will lead to higher rise/fall time. Laser's Package Inductance Compensation A compensation network comprised of C9/R26 or C9/R31 can be used to compensate for the laser package inductance. R26 and R31 share the same pad on the board, so only one at a time can be installed. The values shown on the schematic are used for the symbol only. C9 should be a few pF and R26/R31 around 50 . Performance Figure 2 shows an optical eye diagram obtained with a Fabry Perrot laser driven differentially. (2.5Gbps), PRBS 223–1, ER = 9.5 TIME (67ps/div.) Figure 2. Optical Eye Diagram |
Аналогичный номер детали - 74LCX04 |
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Аналогичное описание - 74LCX04 |
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