The fourth chapter : in this chapter , it introduces the hardware designing of the dsp system based on pci bus and states every module of the hardware designing : circuit of signal adjusting , filter circuit of anti - overlap , circuit of data - acquisition automatically , expanding circuit of dsp memory , circuit of voltage matching , interfaces circuit of pci etc . it also includes theoretic basis and procedure of pcb designing 第四章介紹基于pci總線的dsp系統(tǒng)硬件設(shè)計。敘述了硬件設(shè)計的各個模塊:信號調(diào)理電路、抗混疊濾波電路、自動數(shù)據(jù)采集電路、 dsp存儲器擴(kuò)展電路、電平匹配電路、 pci接口電路等,以及pcb設(shè)計的理論基礎(chǔ)和設(shè)計過程,并給出了設(shè)計和調(diào)試的結(jié)果。