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李英姬,金允溟,林德奎 단국대학교 1984 論文集 Vol.18 No.-
Because the operational amplifiers have finite gain-bandwidth, sometimes they need frequency compensation. Soliman and Ismail suggested a method of active compensations. They made use of dual operational amplifiers. One of dual amplifiers is operated as a main amplifier and another is operated as a feedback element. Soliman and Ismail fixed the poles of the both amplifers the same. But the gain characteristics are not flat enough by this method. In this paper, detail analysis of their method is presented, and the reason why it has such defects is explained. A generalized method is suggested to ameliorate the gain to phase characteristics. Varying the pole location of a feedback amplifier, we were able to acquire proper gain or phase compensntion. Experimental results and computer calculations make good agreements.