Datasheet

LM6181
www.ti.com SNOS634B –MAY 1998–REVISED MAY 2013
Figure 85.
R
f
and R
S
Could Be Increased to Maintain A
V
= −1
and Improve Pulse Response Characteristics.
Figure 86. Resistive Isolation of C
L
Provides Higher Fidelity Pulse Response.
CAPACITIVE FEEDBACK
For voltage feedback amplifiers it is quite common to place a small lead compensation capacitor in parallel with
feedback resistance, R
f
. This compensation serves to reduce the amplifier's peaking in the frequency domain
which equivalently tames the transient response. To limit the bandwidth of current feedback amplifiers, do not
use a capacitor across R
f
. The dynamic impedance of capacitors in the feedback loop reduces the amplifier's
stability. Instead, reduced peaking in the frequency response, and bandwidth limiting can be accomplished by
adding an RC circuit, as illustrated in Figure 88.
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