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| Fig. 2(d) --- OUTPUT SECTION LAYOUT |
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| R23 |
~ 2K for 50 mV/dB slope FS once |
output slope |
| R24 - C17 |
FS once |
overshoot remover |
| C14 |
30 - 300pF FS once |
----- log out limits BW |
| C15 |
~ 4pF (FS once) |
compensation for output amp. |
| C16 |
1-2 pF see app notes |
compensation for input capacitance to output amp |
C17
R24 |
1/2 - 2pF
1 → 3K |
output overshoot remover |
| R25 |
FS |
output Amp DC adj |
| R26 |
≤ 300Ω |
If you probe with a passive probe which has a capacitance greater than 5 pF, you should use a load no greater than 300 ohms to ground. If you are using a 50-ohm or 91-ohm coax cable output to your scope, no load is necessary, but the cable must be correctly terminated. |
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9 February 20, 2008 |
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