SPADE Manual

SPADE ManualSPADE ManualSPADE ManualSPADE Manual

Ma Diming

[email protected]

SPADE IntroductionSPADE Introduction

• Design Features– Schematic Editor (Cadence Virtuoso, or SED)

– Simulator (Synopsys HSPICE)

– 2D/3D GUI for results representation

– Hierarchical design support

– Parameters variation consideration

– Analog design target consideration (PM, ro, A, etc.)

– Symbolic & Accurate

– Matlab like function representation

– Specified model simulation

– … …

SPADE is short for Simulation Program for Analog Design Education

thanks to his father, Prof. Shi.

Analog Design FlowAnalog Design Flow

Circuit Descriptions

Simulation

Results & Analysis

Meet Requirements?

Re-Design

NoNo

Yes, Design Done

Schematic Descriptions

Netlist Descriptions

Numerical, HSpice, Spectrum

Symbolic, GRASS

Waveforms, Curves, Avanwaves

Direct Optimal Results, W/L

A, PM, Z-P, SNR, BW, SR, …

Ideal: Requirements + Design Solution => Results

SPADE Design FlowSPADE Design Flow

GRASS Role

Netlist DC Sim Model Extraction

Graph ReductionH(S)2D/3D Representations

SPADE FlowCircuits

SPADE FrameworkSPADE Framework

A HSpice Like Interface

Formula NetlistSchematic Editor

Cadence ICFBSimulateConfigure Help & About

MenuSPADE

Points Flow is like: Formula / ICFB->Netlist->Configure->Simulate

2D/3D, Parallel, etc. options decided by user to show the results

SPADE OperationsSPADE Operations

Launch Cadence ICFB


Launch GEdit for Text Operations


Launch GUI for Configure Options Setting


Start GRASS Based Simulation


Help & About Documentation

Current SPADECurrent SPADE• Current SPADE Features

– Support Cadence & Synopsys mixed tool co-work– Support bandwidth and phase margin based design target oriented desi

gn considering parameter variations– Support multi-dimensional result representation– Only need DC simulation by HSPICE, no transient simulation needed

• Current SPADE Defects– Not support sub-circuit and hierarchical design– Not support “+” mark or other complicated mark in HSPICE format– Not support format editing and black-box model creation– Not support other design targets except bandwidth and phase margin– Not support large circuit, say over 23 mosfet transistors– Not support IO definition and other kind of operations by schematic edito

r– Not support bipolar

Most of the Defects will be turned into Features by your midterm project

If you ARE Interested, we can do it together, WELCOME to join to the SPADE develop project

SPADE Design StepsSPADE Design Steps1. Login to the server 192.168.5.90 for SPADE Binary2. Open a new terminal and enter into the folder you downloaded the

binary3. Type “csh” or “source ~/.cshrc” to configure the environment varia

bles4. Make sure the files under script folder are executable or type “chm

od +x script/*” command to make it executable5. Make sure your time by “date” command updated with the server6. Launch the SPADE tool by command “./SPADE”7. Launch Cadence ICFB by clicking the “Schematic” Button8. Create your own circuit by Virtuoso following your TA’s instruction

s9. Generate the HSPICE formatted netlist

1. Set the simulator as HSPICE-D2. Create the netlist and save

10. Launch GEdit to modify the created netlist

SPADE Design StepsSPADE Design Steps

11. Modify the netlist as followings1. Add comment in the format “*IODEF: VIN [InputNode] [InputNode AC Amp] VO

UT [OutputNode]” after the 1st line, eg. “*IODEF: VIN 2 1 VOUT 4”

2. Add library statement, eg. “.lib ‘examples/lib/cmos25.lib' tt” at the beginning of the file

3. Add simulation statement “.op” and “.options list node post=2 probe” right above the “.end” statement, statement “.print ac VDB([OutputNode]) VP([OutputNode])” is strongly suggested to be added too

4. Comment “.global” statement, replace the node nonsense to make it meaningful, eg. replace “_gnet*” to “0” or “vdd” in the whole file

5. Comment “.TEMP” statement and statements with “+” mark

6. Make sure the following things are as required1. No mosfet named “m0” exist, otherwise rename it to a index positive

2. VDD and GND node is named as “vdd” or “vdd!” and “gnd” or “0”

3. NMOS and PMOS model is within the library file, say “nmos” for “cmos25.lib” and “nch3” for “log018.l”

4. The simulation level is within the library file, say “tt” for “cmos25.lib” and “tt_3v” for “log018.l”

7. Save the circuit file


12. Save the modified netlist and configure the environment variables1. The view option will decide 2D, 3D or 2D and 3D result representation

by GRASS

2. The library and model option currently is useless but still suggested to be set

3. All the other options must be set before you go to the simulation stage

4. “Node name” and “Display name” can be the same for each parameter

5. Save the configure settings to a file

13. Run the simulation by choosing the right configure file1. If error found during the simulation stage, check the error messages or

the popped error file information and do as the information indicates

14. Finish the 2D & 3D results analysis


15. 2D Operations1. Parameters might be too many for you, just choose the right one

2. All the buttons and menus are not responsible except the “export” one

3. 2D Results is currently with only Amp and PM properties

16. 3D Operations1. 3 windows popped up, surface window (Target-P1-P2), Contour

Window (the crossed surface curve with the 3D distributions), Status Window (the related data value)

2. You can move the 3D curve by “up”, “down”, “left” and “right”; “page up”, “page down”, “home” and “end” key of the keyboard

3. Drag the surface to cross the 3D curve by your left mouse button

4. Right click your mouse in the surface window to switch between different target of analog design

5. Other hot key bindings, please refer to the next page

SPADE Design StepsSPADE Design Steps17. 3D curve hot key bindings (Surface Window)

1. “I” – reset the reference square plane2. “i” – refresh the surface window3. “G”/”g” – refresh the surface window4. “<space>” – refresh5. “<ESC>” – exit6. “l” – save current contour line as lower bound7. “L” – show lower bound info8. “u” – save current contour line as upper bound9. “U” – show upper bound info10. “a” – set previous contour line save or not11. “p” – save contour line as a phase margin copy12. “P” – save contour line as a d(phase margin)/dx copy13. “b” – save contour line as a band width copy14. “B” – save contour line as a d(band width)/dx copy


18. 3D curve hot key bindings (Contour Window)1. “c” – switch between display all saved contour lines as constraints or

not

2. “C” – clear all saved contour lines

3. “d” – switch between design center point display or not

4. “m” – switch between auto-point absorption or not

SPADE ManualSPADE Manual

Thank You

Any question, please feel free to contact me by

[email protected]

Documents

SPADE Manual