Design Method and Characteristics of WDF based on VGIC

전압 변환 GIC에 의한 WDF의 설계 방법 및 특성

In this paper the voltage controlled GIC is classified into two structures, one has the dependent port conductance and the other has the independent port conductance. Nine kinds of configuration for the WDF with two voltage controlled GICs have been found and the design method for WD-LPF has been shown as an example. Their hardware complexity and amplitude characteristics are nearly same as the existing ones, but amplitude error according to coefficient quantization is reduced to about 5% of the error in existing structures. As the result of the numerical analysis of the RPSD to check up the product quantization effect at the WDF output, four kinds of proposed structures have about 10dB less RPSD than existed ones for 6 bits .leq.B .leq.20 bits.