Chapter 7 Part II n n AC Analysis

Chapter 7 模擬電路分析的種類及輸 出格式 (Part II) n n 交流分析(AC Analysis) 雜訊分析(Noise Analysis) 暫態分析(Transient Analysis) 傅立葉分析(Fourier Analysis) 1

交流分析(AC Analysis) n n 主要之作用: 計算電路在某一頻率範圍的 頻率響應 描述格式 n n AC LIN NP FSTART FSTOP AC DEC ND FSTART FSTOP AC OCT NO FSTART FSTOP Example. AC LIN 80 10 Hz 20 KHz 2

Or. CAD PSpice之交流分析設定 AC Sweep/Noise 3

Simulation Settings . AC LIN 80 10 Hz 20 KHz 4

交流分析輸出描述. PRINT AC VA 1 <VA 2…. . VA 8>. PLOT AC VA 1<LO 1, HI 1> VA 2<LO 2, HI 2> …. VA 8<LO 8, HI 8>. PROBE (PROBE. DAT). PROBE VA 1<VA 2…. > (PROBE. DAT) n Example n n . PRINT AC V(5) V(3, 4). PROBE 5

Or. CAD PSpice之交流分析輸出設 定元件 VPRINT 1 VPRINT 2 VPLOT 1 VPLOT 2 6

Step 2: Simulation Settings 9

Step 3: Run and View Outputs DB(V(C 2: 1)) 10

Probe Window 11

13

Label Mark 14

15

Add Y- Axis 17

Output By VPRINT 19

Place Part 20

VPRINT Setting 21

Run and View Outputs 22

Step 2: Simulation Settings 25

Run and View Outputs Max 2. 5119 K, 6. 9332 26

Band Width BW=1. 4462 M 6. 9332 V*0. 707=4. 902 V SHIFT + -> 27

Question & Answer 29

雜訊分析輸出描述 n n n . PRINT Noise VA 1 <VA 2…>. PLOT Noise VA 1<LO 1, HI 1> VA 2<LO 2, HI 2> … VA 8<LO 8, HI 8>. PROBE VA 1 <VA 2…> Example. PRINT Noise INoise 31

Step 2: Simulation Settings 34

Step 3: Run and View Outputs V 2(R 2) 35

Plot 36

View Output 37

PSpice->Run ; View Output VPRINT 2 Result 38

Step 2: Simulation Settings 41

Step 3: Run and View Outputs V(INOISE) V(ONOISE) DB(V(INOISE)) 42

Plot 44

View output file 45

Question & Answer 46

暫態分析(Transient Analysis) n n n 計算電路在某一時間範圍內對應某一輸出變數 的響應 暫態分析描述 SPICE n n n . Tran TStep TStop <TStart<TMAX>><UIC>. Tran 2 ms 300 ms 80 ms 1 ms UIC Or. CADPSpice n n . Tran TStep TStop <NPStep<CEStep>><UIC>. Tran 1 ms 200 ms 50 ms UIC 47

暫態分析輸出描述 n n . Print Tran VA 1<VA 2…. VA 8>. Plot Tran VA 1<(LO 1, HI 1)> VA 2<(LO 2, HI 2)>…… VA 8<(LO 8, HI 8)>. Probe VA 1 VA 2 …. VA 8 48

Insert Vprint and Iprint 51

Vprint and Iprint Settings 52

Step 2: Simulation Settings 53

Step 3: Run and View Outputs 54

View Output File 55

View the Output of Vprint and Iprint 56

Insert Vprint 59

Vprint Setting 60

Step 2: Simulation Settings 61

Step 3: Run and View Outputs Vo Av=251. 282/9. 901 =25. 379 Vin 62

View the Output of Vprint Av=251. 3/9. 901 =25. 381 63

Question & Answer 64

Step 2: Simulation Settings 69

Transient Output File Options 70

Step 3: Run and View Outputs n View Output File 71

Fourier X Axis --> Frequency 73

Question & Answer 79