西工大數(shù)字集成電路實(shí)驗(yàn)四、譯碼器的設(shè)計(jì)及延遲估算

1、數(shù)字集成電路實(shí)驗(yàn)報(bào)告西北工業(yè)大學(xué) 2014年5月21日 星期三實(shí)驗(yàn)四、譯碼器的設(shè)計(jì)及延遲估算1、設(shè)計(jì)譯碼器并估算延遲設(shè)計(jì)一個(gè)用于16bit寄存器堆的譯碼器，每一個(gè)寄存器有32bit的寬度，每個(gè)bit的寄存器單元形成的負(fù)載可以等效為3個(gè)單位化的晶體管(后面提到負(fù)載都為單位化后的負(fù)載)。提示：可以首先假定每一級(jí)的邏輯努力為1，考慮到存在四輸入的與非門(mén)也可考慮假設(shè)總的邏輯努力為2，從而確定譯碼器的級(jí)數(shù)。 譯碼器的結(jié)構(gòu)可參考典型的4-16譯碼器 假定4個(gè)寄存器地址位的正反8個(gè)輸入信號(hào)，每個(gè)信號(hào)的輸入負(fù)載可以等效為10。確定譯碼器的級(jí)數(shù)，并計(jì)算相關(guān)邏輯努力，以此來(lái)確定每一級(jí)中晶體管的尺寸（相當(dāng)于多少個(gè)單

2、位化的晶體管）及整個(gè)譯碼電路的延遲(以單位反相器的延遲的本征延遲Tp0為單位)。答：,假定每一級(jí)的邏輯努力：G=1，又因?yàn)榉种?每個(gè)信號(hào)連接8個(gè)與非門(mén))：，路徑努力所以，使用最優(yōu)錐形系數(shù)就可得到最佳的電路級(jí)數(shù),故N取3級(jí)。因?yàn)檫壿嬇Γ?；路徑努力：則使得路徑延時(shí)最小的門(mén)努力 。所以：第一級(jí)晶體管尺寸為 10；故第二級(jí)晶體管尺寸為；第三級(jí)尺寸為；故延遲為： 如果在四個(gè)寄存器地址輸入的時(shí)候，只有正信號(hào)，反信號(hào)必須從正信號(hào)來(lái)獲得。每個(gè)正信號(hào)的輸入的等效負(fù)載為20,使用與中同樣的譯碼結(jié)構(gòu)，在這種條件下確定晶體管的大小并評(píng)估延遲(以單位反相器的延遲的本征延遲Tp0為單位)。答：因?yàn)檩斎霑r(shí)通過(guò)兩級(jí)反相

3、器，使這兩個(gè)反相器分?jǐn)傇瓉?lái)單個(gè)反相器的等效扇出，將兩級(jí)反相器等效為一級(jí)，故其邏輯努力,故所以：第一級(jí)尺寸為：第二級(jí)尺寸為：第三級(jí)尺寸為：第四級(jí)尺寸為：正信號(hào)通路的延遲為： 反信號(hào)通路情況與上問(wèn)相同，延遲為s譯碼器和寄存器堆的連接情況(Output輸出為1的一行寄存器被選中)2、根據(jù)單位反相器(NMOS:W=0.5u L=0.5u PMOS:W=1.8u L=0.5u)，設(shè)計(jì)出實(shí)際電路，并仿真1題中第一問(wèn)的路徑延遲。 仿真結(jié)果如下：手工測(cè)量結(jié)果為：tp = 9.4413E-08為了簡(jiǎn)單起見(jiàn)，所有晶體管采用最小尺寸代碼如下：.TITLE EXERCISE 4 CMOS INVERTER(The f

4、irst).options probe.options tnom = 25.options post acct probe accurate.options ingold = 2 limpts = 30000 method = gear *ingold：輸出數(shù)據(jù)格式 limpts：AC分析中設(shè)置總點(diǎn)數(shù) method：算法.options lvltime = 2 imax = 20 gmindc=1.0e-12 *lvltime:選擇時(shí)間步長(zhǎng)算法 imax：最大時(shí)間步長(zhǎng)gmindc：DC分析時(shí)用到的與PN結(jié)并聯(lián)的電導(dǎo).protect .lib'C:EricDigital Integrat

5、ed Circuitexperiment 3cmos25_level49.lib' TT.unprotect.TRAN 200P 60N MNMOS_10 N_18 N_15 N_17 N_17 NMOS W=0.5u L=0.5u MNMOS_11 Y10 N_5 N_18 N_18 NMOS W=0.5u L=0.5u MNMOS_12 N_16 N_2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_13 N_21 N_8 N_20 N_20 NMOS W=0.5u L=0.5u MNMOS_14 N_22 N_15 N_21 N_21 NMOS W=0.5u

6、L=0.5u MNMOS_15 Y11 N_10 N_22 N_22 NMOS W=0.5u L=0.5u MNMOS_16 N_20 N_2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_17 N_26 N_24 N_25 N_25 NMOS W=0.5u L=0.5u MNMOS_18 N_27 N_7 N_26 N_26 NMOS W=0.5u L=0.5u MNMOS_19 Y12 N_5 N_27 N_27 NMOS W=0.5u L=0.5u MNMOS_20 N_25 N_2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_21 N_30 N

7、_10 N_29 N_29 NMOS W=0.5u L=0.5u MNMOS_22 N_31 N_24 N_30 N_30 NMOS W=0.5u L=0.5u MNMOS_23 Y13 N_7 N_31 N_31 NMOS W=0.5u L=0.5u MNMOS_24 N_29 N_2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_25 N_34 N_15 N_33 N_33 NMOS W=0.5u L=0.5u MNMOS_26 N_35 N_24 N_34 N_34 NMOS W=0.5u L=0.5u MNMOS_27 Y14 N_5 N_35 N_35 NMOS

8、W=0.5u L=0.5u MNMOS_28 N_33 N_2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_29 N_38 N_10 N_37 N_37 NMOS W=0.5u L=0.5u MNMOS_30 N_39 N_15 N_38 N_38 NMOS W=0.5u L=0.5u MNMOS_31 Y15 N_2 N_39 N_39 NMOS W=0.5u L=0.5u MNMOS_32 N_37 N_24 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_33 N_15 N_7 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_34

9、 N_24 N_8 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_35 N_5 A0 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_36 N_10 N_5 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_37 N_7 A1 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_38 N_8 A2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_39 N_44 A3 N_43 N_43 NMOS W=0.5u L=0.5u MNMOS_40 N_43 N_47 N_46 N_46 NMOS W=0.5u L=

10、0.5u MNMOS_41 N_46 N_48 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_42 N_47 Gnd Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_43 N_48 Gnd Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_44 N_2 N_44 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_1 N_1 N_2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_2 Y8 N_5 N_3 N_3 NMOS W=0.5u L=0.5u MNMOS_3 N_3 N_7 N_6 N_6 NMOS

11、W=0.5u L=0.5u MNMOS_4 N_6 N_8 N_1 N_1 NMOS W=0.5u L=0.5u MNMOS_5 N_12 N_8 N_11 N_11 NMOS W=0.5u L=0.5u MNMOS_6 N_13 N_7 N_12 N_12 NMOS W=0.5u L=0.5u MNMOS_7 Y9 N_10 N_13 N_13 NMOS W=0.5u L=0.5uMNMOS_8 N_11 N_2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_9 N_17 N_8 N_16 N_16 NMOS W=0.5u L=0.5uMNMOS_80 N_70 N_36

12、 N_69 N_69 NMOS W=0.5u L=0.5u MNMOS_81 Y0 N_42 N_70 N_70 NMOS W=0.5u L=0.5u MNMOS_82 N_68 N_40 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_83 N_71 N_40 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_84 Y2 N_42 N_72 N_72 NMOS W=0.5u L=0.5u MNMOS_85 N_72 N_52 N_73 N_73 NMOS W=0.5u L=0.5u MNMOS_86 N_73 N_32 N_71 N_71 NMOS W=0.

13、5u L=0.5u MNMOS_87 N_67 N_40 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_88 Y1 N_41 N_66 N_66 NMOS W=0.5u L=0.5u MNMOS_45 N_23 N_9 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_46 N_28 N_19 N_23 N_23 NMOS W=0.5u L=0.5u MNMOS_47 N_14 Vdd N_28 N_28 NMOS W=0.5u L=0.5u MNMOS_48 N_32 A2 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_49 N_36

14、A1 Gnd Gnd NMOS W=0.5u L=0.5uMNMOS_50 N_40 N_14 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_51 N_9 Gnd Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_52 N_19 A3 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_53 N_41 N_42 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_54 N_45 N_49 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_55 Y7 N_40 N_50 N_50 NMOS W=0.5u L=0.5u

15、 MNMOS_56 N_50 N_52 N_51 N_51 NMOS W=0.5u L=0.5u MNMOS_57 N_51 N_41 N_45 N_45 NMOS W=0.5u L=0.5u MNMOS_58 N_42 A0 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_59 N_49 N_32 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_60 N_52 N_36 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_61 N_53 N_40 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_62 Y4 N_42 N_54

16、 N_54 NMOS W=0.5u L=0.5u MNMOS_63 N_54 N_36 N_55 N_55 NMOS W=0.5u L=0.5u MNMOS_64 N_55 N_49 N_53 N_53 NMOS W=0.5u L=0.5u MNMOS_65 N_56 N_40 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_66 Y3 N_41 N_57 N_57 NMOS W=0.5u L=0.5u MNMOS_67 N_57 N_52 N_58 N_58 NMOS W=0.5u L=0.5u MNMOS_68 N_58 N_32 N_56 N_56 NMOS W=0.5

17、u L=0.5u MNMOS_69 N_59 N_40 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_70 Y6 N_42 N_60 N_60 NMOS W=0.5u L=0.5uMNMOS_71 N_60 N_49 N_61 N_61 NMOS W=0.5u L=0.5u MNMOS_72 N_61 N_52 N_59 N_59 NMOS W=0.5u L=0.5u MNMOS_73 N_62 N_40 Gnd Gnd NMOS W=0.5u L=0.5u MNMOS_74 Y5 N_36 N_63 N_63 NMOS W=0.5u L=0.5u MNMOS_75 N_6

18、3 N_49 N_64 N_64 NMOS W=0.5u L=0.5u MNMOS_76 N_64 N_41 N_62 N_62 NMOS W=0.5u L=0.5u MNMOS_77 N_66 N_36 N_65 N_65 NMOS W=0.5u L=0.5u MNMOS_78 N_65 N_32 N_67 N_67 NMOS W=0.5u L=0.5u MNMOS_79 N_69 N_32 N_68 N_68 NMOS W=0.5u L=0.5u MPMOS_1 Y8 N_5 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_2 Y8 N_7 Vdd Vdd PMOS W=

19、1.8u L=0.5u MPMOS_3 Y8 N_8 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_4 Y8 N_2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_5 Y9 N_2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_6 Y9 N_8 Vdd Vdd PMOS W=1.8u L=0.5uMPMOS_7 Y9 N_7 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_8 Y9 N_10 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_9 Y10 N_2 Vdd Vdd PMOS W=1.8u

20、L=0.5u MPMOS_10 Y10 N_8 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_11 Y10 N_15 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_12 Y10 N_5 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_13 Y11 N_2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_14 Y11 N_8 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_15 Y11 N_15 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_16 Y11 N_10 Vdd Vdd P

21、MOS W=1.8u L=0.5u MPMOS_17 Y12 N_2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_18 Y12 N_24 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_19 Y12 N_7 Vdd Vdd PMOS W=1.8u L=0.5uMPMOS_20 Y12 N_5 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_21 Y13 N_2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_22 Y13 N_10 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_23 Y13 N_24

22、 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_24 Y13 N_7 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_25 Y14 N_2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_26 Y14 N_15 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_27 Y14 N_24 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_28 Y14 N_5 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_29 Y15 N_24 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS

23、_30 Y15 N_10 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_31 Y15 N_15 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_32 Y15 N_2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_33 N_15 N_7 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_34 N_10 N_5 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_35 N_24 N_8 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_36 N_5 A0 Vdd Vdd PMOS W=1.8u

24、L=0.5u MPMOS_37 N_7 A1 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_38 N_8 A2 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_39 N_44 A3 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_40 N_44 N_47 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_41 N_44 N_48 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_42 N_47 Gnd Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_43 N_48 Gnd Vdd Vdd

25、PMOS W=1.8u L=0.5u MPMOS_44 N_2 N_44 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_50 N_40 N_14 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_51 N_9 Gnd Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_52 N_19 A3 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_53 N_41 N_42 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_54 Y7 N_40 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_55 Y7

26、N_52 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_56 Y7 N_41 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_57 Y7 N_49 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_58 N_42 A0 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_59 N_49 N_32 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_60 N_52 N_36 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_61 Y5 N_41 Vdd Vdd PMOS W=1.8u L=0.5u

27、MPMOS_62 Y5 N_40 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_63 Y4 N_42 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_64 Y4 N_36 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_65 Y4 N_49 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_66 Y4 N_40 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_67 Y6 N_42 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_68 Y6 N_49 Vdd Vdd PMOS W=1.8u

28、 L=0.5u MPMOS_69 Y6 N_52 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_70 Y6 N_40 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_71 Y5 N_36 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_72 Y5 N_49 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_73 Y1 N_41 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_74 Y1 N_36 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_75 Y1 N_32 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_76 Y1 N_40 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_77 Y0 N_40 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_78 Y0 N_32 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_79 Y0 N_36 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_80 Y0 N_42 Vdd Vdd PMOS W=1.8u L=0.5u MPMOS_81 Y3 N_41 Vdd Vdd PMOS W=1.8u