Abstract
The quotients of continued fraction expansion of a composite system are given explicitly in terms of the quotients of subsystems. Using the expression, the new design method is proposed such that the feedback system has some specified quotients of continued fraction expansion. The method is straightforward free from entanglement with the solution of the nonlinear algebraic equations which are given in the method proposed by Chen & Shieh.
However, the problem of stability still remains. It is necessary to examine the stability of a feedback system, and if it is unstable, the way of compensation should be changed.
