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and RISO serve to counteract the loss of phase margin by feeding the high frequency component of the output signal back to the

amplifier

’s inverting input, thereby preserving the phase margin in the overall feedback loop. Capacitive drive can be increased

by increasing the value of CF. This in turn will slow down the pulse response.

+

-

VIN

RISO

CL

VOUT

RF

RL

CF

Figure 3. Indirectly Driving a Capacitive Load with DC Accuracy