Analog,RF and EMC considerations in printed wiring board by Colotti J. PDF

By Colotti J.

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45 Notes: 1. R in mΩ , L in nH, C in pF 2. Dimensions are in mils. 3. Planes are evenly spaced. 4.

50, height: 30 mils 3. 2 pF/in Inductance 42 x 42 60 x 60 (≈ 0603) (≈ 0805) Notes: 1. Copper: 1 oz, electrodeposited, strip-line. 2. 025, height 10 mils. 45 Notes: 1. R in mΩ , L in nH, C in pF 2. Dimensions are in mils. 3. Planes are evenly spaced. 4.

503 FR4 dielectric loss exceeds copper loss at 1 GHz Notes: 1. Copper: 1 oz, electrodeposited, 10 mil width, 50 Ohms, strip-line 2. 025, height 28 mils 3. 004, height 22 mils 4. Loss units are dB/inch Revision 4 Copyright Telephonics 2002-2005 34 Conductor Loss DC Resistance R DC = ρ l l = ρ tw A l R DC = 0 . 6 Ω (0 . 0014 in )(0 . 010 in ) R DC = 0 . 3 Ω (0 . 0007 in )(0 . 005 in ) A t w Skin Depth δ = δ = δ = Revision 4 ρ π fµ 0 •Current density drops to 37% (1/e) •Ignore if t<2δ 0 . 0172 µ Ω m = 660 nm = 0 .

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Analog,RF and EMC considerations in printed wiring board design by Colotti J.


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