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ＦＸ２２４／２１４／２３４与滚动式语音加密电路张殿英，刘虹霞一、杨述ＦＸ２２４／２１４／２３４是英国ＣＭＬ公司生产的低功耗ＣＭＯＳ大规模集成专业话音加密芯片。它把输人的话音频带裂割成高低两个频带，用高段、低段载频分别进行调制．然后利用开关电容滤波器滤...
FX224 / 214/234 and Rolling Speech Encryption Circuit Zhang Dianying, Liu Hongxia, Yang Shu The FX224 / 214/234 is a low-power CMOS large-scale integrated professional voice encryption chip produced by CML Company in the United Kingdom. It splits the input speech band into high and low frequency bands and modulates them separately with high and low carrier frequencies. Then use switched capacitor filter ...