P-Channel and N-Channel Switching FET와 Capacitor를 이용한 ORFS Switching Spectrum error correction 방법

The goal of this paper is to propose a method of ORFS switching spectrum error correction using P-Channel and N-Channel Switching FET and Capacitor on GSM PCMCIA Card Type. We have developed the GSM PCMCIA card also including 2.2mF load capacitor and dual FET package IC. Firstly, we explain Output RF Spectrum of GSM system effect on the modulation, wide band noise and switching transient. Secondly, we propose the schematic for improvement on ORFS for GSM system. To sum up, the proposed schematic was improvement 10㏈ switching spectrum margin and reduce the noise level approximately 290㎷.