Power_op_amp_with_remote_sensing

Published:2009/7/24 23:45:00 Author:Jessie | From:SeekIC

This circuit shows an LM12 (Fig. 10-46) connected as a differential-input amplifier with dc feedback from a remotely sensed load. The ac feedback is directly from the op-amp output and the signal common at the sending end. There is no feedback from the load at high frequencies. The optimum capacitance for C1/C2 depends on the cable delay. Note that the common and LM12 output cables must be capable of carrying a typical 10A, whereas the feedback-sensing cables can be small. For a single-ended input, strap the unused input terminal to common.



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