Hspice Tutorial(2011)

Introduction to Hspice

2011/10/28

Advisor: Ke-Horng Chen

Speaker: Wei-Chung Chen

混合訊號及電源管理晶片積體電路實驗室

LAB 912 1


LAB 912 2

Content

SPICE Overview

Simulation Input and Controls

Sources

Analysis Types

Simulation Output and Controls

Graphic tools

Reference: CIC SPICE Note


LAB 912 3

SPICE Overview

Simulation:

Predicting the Circuit/System Characteristic after manufacturing

Circuit simulation:

Physical model

Circuit structure

SPICE:

Simulation Program with Integrated Circuit Emphasis

SPICE tools (HSPICE, Spectre, PSPICE…)

Steady-State, Transient, and Frequency Domains

低功率混合設計實驗室

LAB 802 4

Basic Flow for SPICE


LAB 912 5

Content

SPICE Overview


Sources

Analysis Types


Simulation tool & Graphic tools


LAB 912 6

HSPICE Data Flow 1. Write circuit

2. Simulation the circuit

3. Awaves tools


LAB 912 7

Net Structure ( SPICE Preferred )


LAB 912 8

Element and Node Naming Conventions

Either Names or Numbers (e.g. d1 a1 b22)

0 (zero) = Ground

Ignoring trailing Alphabetic Character in Node Number (e.g. 5a=5b=5)

Ground may be 0, GND

All nodes = Local

.GLOBAL Statement (e.g. .GLOBAL VDD VSS )


LAB 912 9

Element and Node Naming Conventions

(Cont.)


LAB 912 10

Unit and Scale Factors


LAB 912 11

Input Control Statement: .option


LAB 912 12

Input Control Statement: .option (con’t)

.option method = gear Most stable

Analog

Switching regulator, using gear algorithm

.option method = trap Highest accuracy

Lowest simulation time

Best for CMOS digital circuit


LAB 912 13

Input Control Statement: .temp

.Temp statement: No Specifying → Defaulting 25ºC for HSPICE

Library Input Statement


LAB 912 14

Input Control Statement: .alter


LAB 912 15

Input Control Statement: .alter

(cont’d)


LAB 912 16

Description of MOSFET


LAB 912 17


LAB 912 18

Hierarchical Circuit


LAB 912 19

Hierarchical Circuit (con’t)


LAB 912 20

Content

SPICE Overview


Sources

Analysis Types




LAB 912 21

DC, AC Sources


LAB 912 22

Transient Sources

Transient sources statement:

Pulse (PULSE Function)

Sinusoidal (SIN Function)

Exponential (EXP Function)

Piecewise Linear (PWL Function)


LAB 912 23

Pulse Source Function


LAB 912 24

Sinusoidal Source Function


LAB 912 25

Piecewise Linear Source Function


LAB 912 26

Voltage and Current Controlled Elements


LAB 912 27

Content

SPICE Overview


Sources

Analysis Types



Reference: CIC Note


LAB 912 28

Analysis Types & Orders


LAB 912 29

DC Sweep & DC Small Signal Analysis


LAB 912 30

DC Sweep & DC Small Signal Analysis

(con’t)


LAB 912 31

AC Sweep & AC Small Signal Analysis


LAB 912 32

AC Sweep & AC Small Signal Analysis

(con’t)


LAB 912 33

Transient Analysis


LAB 912 34

Transient analysis (Cont.)


LAB 912 35

Content

SPICE Overview


Sources

Analysis Types



Reference: CIC Note


LAB 912 36

Output Files Summary (HSPICE)


LAB 912 37

Output Statement


LAB 912 38

Content

SPICE Overview


Sources

Analysis Types



Reference: CIC Note

Simulation tool-Hspice


LAB 912 39

看波形執行模擬

目前模擬檔案

選擇模擬檔案

(1st step)

Open XXX.sp (可進行編輯)

Open XXX.lis (內有模擬完的資訊)


LAB 912 40

Graphic tools-Awaves

Tool button

menu

Waveform data waveform

選擇欲觀察的波形中的訊號 (1st step) (見下一頁)


LAB 912 41

Result browser

Step1: Analysis type

Step2: Instant name and hierarchy

Set X axis

Data name and data type

Design name

Step3: Step4:

Step5:

42

Awaves Windows 放大鏡工具

常用的觀察工具

跑頻率響應的模擬要在橫軸上點右鍵改單位log

Example

(1) op.sp.op

(2) ac.sp.ac-頻率響應分析

(3) dc.sp.dc-dc掃描

(4) tr.sp.tran-時域分析


LAB 912 43

模擬檔案輸出檔案註解1 註解2

(1) op.sp op.list DC operation point 以記事本打開

(2) ac.sp ac.ac0 Frequency Analysis

波形黨 (3) dc.sp dc.sw0 DC Sweep

(4) tr.sp tr.tr0 Transient response

XXX.list

以記事本打開 (1)搜尋關鍵字”concluded”

(2)mos的名子

重要資訊 (3)Ids

(4)VGS、VDS

(5)VTH

(6)VGS-VTH

(7)gm

(8)1/rDS


LAB 912 44

(1)

(2)

(3)

(4)

(6)

(5)

(7)

(8)

dc.sp / op.sp / ac.sp


LAB 912 45

VSS

VDrain

VGate

VSS

VINVOUT

AC 1V

dc.sp op.sp

ac.sp

tr.sp


LAB 912 46

VDD

VSS

db cinv0 inv1

MP0

MN0

Cout

a

Appendix: SPICE Instructions

DC Analysis:

.dc temp -40 120 10

.dc Vdrain 0 5 0.1 sweep VGate 3 5 0.1

AC Analysis

.ac dec 10 1 10G

.ac dec 10 1 10G sweep temp -40 120 10

.probe vdb(XXX) vp(XXX)

Transient Analysis:

.tran 1n 100u

.tran 1n 100u UIC

.tran 1n 100u sweep temp -40 120 20


LAB 912 47

Thanks for your attention!


LAB 912 48

Hspice Tutorial(2011)

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