CMOS기술의 발전에 의해 연속신호시스템은 상당한 발전을 가져왔다. 이 논문에서는 새로운 CMOS floating저항을 써서 저역통과필터를 설계하고 PSpice Simulation을 통하여 그 특성이 우수함을 입증하였다. 특히, CMOS로 구성되는 새로운 floating저항은 포화영역에서 동작하도록 구현하였다. 이 방법으로 설계된 저역통과필터는 SC필터보다 구조가 더 간단하므로 IC화 할 때 칩 면적을 감소시킬 수 있다.
The continuous time signal system by development of CMOS technology have been receiving consideration attention. In this paper, Low pass filter using new CMOS floating resistor have been designed with cut off frequency for speech signal Processing. Especially a new floating resistor consisting entirely of CMOS devices in saturation has been developed. Linearity within $pm$0.04% is achieved through nonlinearity via current mirrors over an applied range of $pm$1V The frequency response exceeds 10MHz, and the resistors are expected to be useful in implementing integrated circuit active RC filters. The low pass filter designed using this method has simpler structure than switched capacitofilter. So reduce the chip area. The characteristics of the designed low pass filter using this method are simulated by pspice program.
