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HSMP-381F датащи(PDF) 4 Page - Agilent(Hewlett-Packard) |
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HSMP-381F датащи(HTML) 4 Page - Agilent(Hewlett-Packard) |
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4 / 9 page ![]() 4 Typical Applications for HSMP-481x Low Inductance Series Microstrip Series Connection for HSMP-481x Series In order to take full advantage of the low inductance of the HSMP-481x series when using them in series applications, both lead 1 and lead 2 should be connected together, as shown in Figure 7. Figure 7. Circuit Layout. 0.3 nH 0.3 nH 0.3 pF Rj 1.5 nH 1.5 nH Figure 9. Equivalent Circuit. R j ≈ 0.08 + 2.5 I b 0.9 12 3 Figure 6. Internal Connections. HSMP-481x Microstrip Shunt Connections for HSMP-481x Series In Figure 8, the center conductor of the microstrip line is interrupted and leads 1 and 2 of the HSMP-481x series diode are placed across the resulting gap. This forces the 1.5 nH lead inductance of leads 1 and 2 to appear as part of a low pass filter, reducing the shunt parasitic inductance and increasing the maximum available attenuation. The 0.3 nHof shunt inductance external to the diode is created by the via holes, and is a good estimate for 0.032" thick material. 50 OHM MICROSTRIP LINES PAD CONNECTED TO GROUND BY TWO VIA HOLES Figure 8. Circuit Layout. |
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