FREQUENCY-DEPENDENT ERASURE CIRCUIT AND PHASE SHIFT CIRCUIT USING THE SAME

摘要

<P>PROBLEM TO BE SOLVED: To provide a frequency-dependent erasure circuit in which the amplitude of an output signal does not change but only the phase thereof is shifted at 90° with respect to an input signal, and which can keep accuracy without changing a circuit constant over a wide band; and a phase shift circuit using the same. Ž<P>SOLUTION: The frequency-dependent erasure circuit 2 is structured such that an integrator 5 and a differentiator 6 are each connected to an input terminal; the integrator 5 and the differentiator 6 are connected to a multiplier 8; outputs of the integrator 5 and the differentiator 6 are multiplied with each other by the multiplier 8 to eliminate frequency dependency of signal amplitude; and only the phase is shifted at 90°. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž