This paper describes the error control coding of the flex paging system , with emphasis on the design and implement of the flex decoder circuit by means of the fpga technology 本文介紹了flex高速無線尋呼系統中的差錯控制編碼技術,以及bch ( 32 , 21 )糾錯碼的構成和譯碼方法,重點討論了flex高速尋呼解碼芯片的fpga設計與實現。
This is the core of the issue . in this section we designed the cells of the dac , including the decoder circuit , bandgap reference voltage circuit , current source circuit and switched circuit etc . the fourth chapter the simulations of circuit and errors of the dac are discussedi , so the simulation waveforms are plotted on the paper and we must take the error corrections and minimize ways 對于整個d a轉換器的具體結構和電路設計放在第三章,這也是本文的核心之處,對d a轉換器的整體電路及主要電路單元如:數字譯碼電路、帶隙參考電壓源電路、電流源產生電路、差分電流開關電路等進行詳細地分析和設計。