Feedforuoard_compensation_to_speed_op_amp_response

Published:2009/7/24 23:05:00 Author:Jessie | From:SeekIC

The slew rate and bandwidth of most op amps can be increased using feedforward compensation. Figure 10-44A shows an LM101A with standard compensation, while Fig. 10-44B shows feedforward compensation. Figure 10-44C shows a comparison of the two methods. Feedforward is accomplished by connecting C1 between the inverting input and one of the compensation pins (to eliminate internal pnps from the signal path at high frequencies). Unity gain bandwidth is extended from about 1 to 10 MHz, while the slew rate is increased from about 0.5 to 10 V/μS.



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