1、習題和練習題,羅嶸,組合習題,用兩片 74 148 8- 3 線優(yōu)先編碼器（參看數(shù)據(jù)手冊）構成 16 -4線優(yōu)先編碼器（可附加其他的門電路）,觸發(fā)器習題,圖1是一個門控的JK鎖存器的邏輯圖和功能表。分析這個電路存在的問題。為了讓該電路實現(xiàn)JK 觸發(fā)器的正常功能，該怎么辦？,,,,,,,圖1,(b),觸發(fā)器習題,The input signals shown in Fig. 1 are applied to the master-sla

2、ve JK flip-flop of Fig. 2 when initially in its 0-state. Sketch the QM and QS output signals. Assume all timing constraints are satisfied.,Fig.1,,,J,K,C,,t,,,Fig.2,,計數(shù)器習題,利用兩片74 LS 160具有異步清零和同步送數(shù)功能的十進制計數(shù)器，以及其它的門電路實現(xiàn)24進制的

3、計數(shù)器，請畫出邏輯圖,ASM習題,Convert the Mealy state diagram into an equivalent ASM chart.請把此米利型狀態(tài)圖轉換成ASM流程圖,多路選擇器習題,Design a customized multiplexer with four 4-bit input buses P, Q, R, and T, selecting one of the buses to drive a

4、4-bit output bus Y according to Table X5.89. Use two 74x153s and a code converter that maps the eight possible values on S2–S0 to four select codes for the 74x153s. Choose a code that minimizes the size and propagation d