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A scheme reducing error on source followers due to the body effect is proposed. A node of a source follower which has been connected to a DC voltage source is excited by a control circuit so that an output signal is well compensated. The scheme employs an additional source follower for detecting error of an original source follower. Since the error is algebraically analyzed, a characteristic of a control circuit for tuning the node potential is solved. Based on the scheme a level-shift circuit is given and its effectiveness is confirmed through computer simulations and application to the bias-offset technique.