Abstract
기저대역 채널선택 필터는 외부의 잡음이나 공정상의 변화에 따라 각각의 통신 채널을 선택하기 위해 인가되는 제어 전압이 변동될 수 있다. 본 논문에서는 제어 전압을 일정하게 유지시키기 위해, 전류의 흐름을 감지하여 채널선택 필터의 차단주파수가 자동으로 조정되어 필터 동작이 원활하게 유지되면서 최소 면적을 갖는 전류 비교 방식 전압 안정화 회로를 설계하였다. Control voltage for baseband channel selection filter to select one of communication channels can be easily fluctuated according to external noise or variation of fabrication. In this paper, we design a voltage regulator with small chip area to keep control voltage constantly using current comparative method. Cut-off frequency of channel selection filter is automatically controlled by detecting current flow using the proposed voltage regulator.
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