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AN-733
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SNUBBER NETWORK
ANOTHER WAY TO STABILIZE AN OP AMP DRIVING A CAPACITIVE
LOAD IS WITH THE USE OF A SNUBBER, AS SHOWN IN FIGURE
9. THIS METHOD PRESENTS THE SIGNIfi CANT ADVANTAGE OF
NOT REDUCING THE OUTPUT SWING BECAUSE THERE IS NOT
ANY ISOLATION RESISTOR IN THE SIGNAL PATH. ALSO, THE USE
OF THE SNUBBER DOES NOT DEGRADE THE GAIN ACCURACY OR
CAUSE EXTRA DISTORTION WHEN DRIVING A NONLINEAR LOAD.
THE EXACT R S AND C S COMBINATIONS CAN BE DETERMINED
EXPERIMENTALLY.
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FIGURE 11. CAPACITIVE LOAD DRIVE WITH THE SNUBBER
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FIGURE 12. EVAL-PRAOPAMP-1RM ELECTRICAL SCHEMATIC
FIGURE 13. EVAL-PRAOPAMP-1RM BOARD LAYOUT PATTERNS
? 2004 ANALOG DEVICES, INC. ALL RIGHTS RESERVED. TRADEMARKS AND REGISTERED TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS.
–4–
REV. A
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