DC A.r100

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1 DC A.r100

2 Restricted Rights Legend Use, duplication or disclosure by the U.S. Goverment is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS for DoD agencies, and subparagraphs (c)(1) and (c)(2) of the Commercial Computer Software Restricted Rights clause at FAR for other agencies. Agilent Technologies 395 Page Mill Road Palo Alto, CA U.S.A. Copyright c , Agilent Technologies. All Rights Reserved. Acknowledgments Mentor Graphics is a trademark of Mentor Graphics Corporation in the U.S. and other countries. Microsoft r, Windows r, MS Windows r, Windows NT r, and MS-DOS r are U.S. registered trademarks of Microsoft Corporation. Pentium r is a U.S. registered trademark of Intel Corporation. PostScript is a trademark of Adobe Systems Incorporated. UNIX r is a registered trademark of the Open Group. Java TM is a U.S. trademark of Sun Microsystems, Inc. ii

3 1 : DC 1-1 DC (ADS ) BJT DC DC DC RFDE ADS RFDE (ADS ) iii

4 I-V DC , , Index-1 iv

5 1 : DC DC (DUT) RF/ DC RF/ DC DC : (ODE) ( ) DC 1 (I-V ) Advanced Design System DC Simulation Simulation-DC Analog Design Environment DC Simulation ADSsim DC 1-2 DC DC 1-1

6 1 : DC 1-2 (ADS ) DC IV 1-7 DC DC 1-9 DC DC 1-20 DC : DC sweep Help (ADS ) DC BJT BJT (ADS )

7 BJT Figure 1.1 BJT DC DC1.dsn Tutorial/SimModels prj Examples DC1.dds Figure 1.1 DC DC 1. Sources-Freq Domain V DC (ADS ) 1-3

8 1 : DC (Insert > Node Name) 2. Sources-Freq Domain I DC 3. Probe Components I Probe 4. Simulation-DC DC 5. OK 6. Simulate DC Simulate > Annotate DC Solution Simulate > Detailed Device Operating Point Brief Device Operating Point Simulate > Clear DC Annotation 7. DC Figure 1.2 MOSFET DC V dd V gg 1-4 (ADS )

9 DC2.dsn Tutorial/SimModels prj Examples DC2.dds Figure 1.2 DC cells binning cells VarEqn DC 1. Sources-Freq Domain V DC V DC (ADS ) 1-5

10 1 : DC (SRC1) Vdc=Vgg1 2. V DC (SRC2) Vdc=Vdd1 3. Probe Components I Probe SRC2 ( Probe1 ) 4. DC Sweep : Parameter to sweep = Vdd1 ( SweepVar ) ( DC SweepVar ) Start = 0 Stop = 6 Step = OK 6. Simulation-DC PSWP (ParamSweep) : Sweep : Parameter to sweep = Vgg1 Start = 2 Stop = 3 Step = 0.25 Simulations : Simulation 1 = DC1 ( SimInstanceName[1] ) 7. OK 8. Data Items Var eqn (Variables and equations) : Vdd1 = 4 Vgg1 = OK 10. (Probe1.i) 1-6 (ADS )

11 : DC DC DC DC : (DUT) (I-V ) DC DC (ODE) / DC 1-7

12 1 : DC DC : ( ) ( ) (S ) ( harmonic balance ) S ( ) - DC transient, harmonic balance, DC AC harmonic balance ( ) harmonic balance 1-8 DC

13 DC DC Sweep Parameters Output ADS RFDE Analog Design Environment Outputs > Save Options Display (ADS) RFDE RF Design Environment DC DC (PSF ) DC Analysis Save Voltages and Currents Device Operating Point Level (Brief Detailed) Analog Design Environment Results > Annotate analoglib ADSsim Spectre 1. Edit > Component Display analoglib 2. Edit Component Select Label parameter DC 1-9

14 1 : DC 3. Parameter Labels Apply To library operating point 4. none OK Save Voltages and Currents Device operating point level ADS 1 DC ( DC ) DC None None (None) Brief (Brief) Detailed (Detailed) ADS 3 : sweep plan ADS 1.1: ADS DC Sweep Parameter to sweep (SweepVar) 1-10 DC

15 1.1: ADS DC Parameter sweep Sweep Type Single point Paramter Linear Start/Stop Center/Span Log Start/Stop Center/Span Start/Stop Start/Stop Step-size Log Pts./decade Center/Span Start (Start) Stop (Stop) Step-size (Step) Num. of pts. (Lin) Center/Span Pts./decade Linear Step-size Center (Center) Span (Span) Pts./decade (Dec) Num. of pts. (Lin) : Start, Stop Use sweep plan (SweepPlan) sweep plan (SweepPlan) RFDE 3 : Parameter Sweep DC 1-11

16 1 : DC Sweep plan 1.2: ADS DC Paramter Sweep Parameter Type Design Variable Temperature Component Parameter Model Parameter Select Select Design Variable Editing Design Variables Variable Name temp Select Select Component Parameter OK Variable Name Sweep Plan : Start-Stop Start Stop Center-Span Start - Stop - Center Span Center - Span - : 1-12 DC

17 1.2: ADS DC Linear Logarithmic Points Only Additional Points Step Size Number of Steps Additional Points Step Size - Number of Steps - Points Per Decade Number of Steps Additional Points Points Per Decade - Number of Steps - Specific Points Linear Logarithmic 4 ADS Parameters Convergence 1.3: DC DC 1-13

18 1 : DC 1.3: DC Max. Delta V (MaxDeltaV) Max. Iterations (MaxIters) Mode (ConvMode) Auto sequence (0) Quick convergence test (1) V :, Hybrid solver Forward/reverse source sweeping Pseudo transient Rshunt sweeping Newton-Raphson Max. delta V Newton-Raphson Newton-Raphson Max. delta V Newton-Raphson Max. delta V Newton-Raphson Quick convergence test Forward source-level sweep Reverse source-level sweep, Rshunt sweep, hybrid solver, pseudo transient Quick convergence test 1-14 DC

19 1.3: DC Robust convergence test (2) Newton- Raphson (3) Forward source-level sweep (4) Rshunt sweep (5) Reverse source-level sweep (6) 1. Newton-Raphson Max. delta V 2. Forward source-level sweep Max. delta V 3. Rshunt sweep, Reverse source-level sweep hybrid solver Max. delta V 4. pseudo transient Quick convergence Hybrid solver 0 0 forward source-level sweep out of bounds Rshunt sweep Reverse source-level sweep 1e-6 Ω Forward source-level sweep / ArcMinValue Reverse source-level sweep Forward source-level sweep Forward source-level sweep out of bounds Reverse source-level sweep ( ) DC 1-15

20 1 : DC 1.3: DC Hybrid solver (7) Auto sequence Gmin Pseudo transient (8) Arc Max Step (ArcMaxStep) Arc Level Max Step (ArcLevelMaxStep) : Gmin : 1 MΩ : transient ArcMaxStep (ADS ) 0 ArcLevelMaxStep (ADS ) Arc Min Value (ArcMinValue) ArcMaxValue ArcMinValue ρ ρ ArcMinValue ρ ρ ArcMinValue ρ min ρ max ρ min, ρ min ρ max (ADS ) 1-16 DC

21 1.3: DC Arc Max Value (ArcMaxValue) Max Step Ratio (MaxStepRatio) Max Shrinkage (MaxShrinkage) Limiting Mode (LimitingMode) Global Element Compression Global Device-based Limiting Dynamic Element Compression Dynamic Vector Compression Global Vector Compression Global Vector Scaling No Limiting ArcMinValue ArcMaxValue ρ ρ ArcMaxValue ρ ρ ArcMaxValue ρ max + ρ max ρ min, ρ min ρ max (ADS ) ( 100) (ADS ) ( 1e-5) (ADS ) (ADS ) log log log log DC 1-17

22 1 : DC 1.3: DC Levels (ADS) Annotation (RFDE) Status level Status/Summary (StatusLevel) Device operating point level (DevOpPtLevel) (ADS) (RFDE 1-9 RFDE ) ADS 1 DC ( DC ) DC None None (None) Brief (Brief) Detailed (Detailed) Output Solutions Output solutions at all steps (OutputAllSolns) Optimization 1-18 DC

23 1.3: DC Compute Sensitivities Using Finite Difference (UseFiniteDiff) Other N N+1 (ADS ) Other=HiddenParameter1=value HiddenParameter2=value... (ADS ) DC Options (ADS ) ConvMode Newton-Raphson Newton-Raphson ( ) Robust convergence test Quick convergence test Hybrid solver (ADS ) 1. DC Display DC 1-19

24 1 : DC 2. ConvMode OK Auto sequence 0 Quick convergence test 1 Robust convergence test 2 Newton-Raphson sweep 3 Forward source-level sweep 4 Rshunt sweep 5 Reverse source-level sweep 6 Hybrid solver 7 Pseudo transient 8 Options Topology checker Options Issue warnings (GiveAllWarnings) Maximum number of warnings (MaxWarnings) Simulation/Synthesis Messages Status/Summary (Window Show Complete Status Message ) netlist.log 1-20

25 DC Status Level 4 RHS NORM Max. Delta V Options Circuit envelope transient 1-21

26 1 : DC DC ( ) Options / RHS NORM ( Max Delta V ( 0.1 V)) Max. Delta V 1e9 / Hybrid Max. Delta V 0.02 Max. Delta V hybrid 0 V Max. Delta V =

27 Imax RHS NORM p-n 1 A Imax 1 A Imax 1e3 BSIM3 Ijth SDD RHS NORM 1 V p-n S 11 Ω ( S) R s 16 1 V A p-n p-n Ω Nodeset Nodeset 100 RHS NORM Max. Iterations ( 250) 1-23

28 1 : DC 250 Max. Iterations : sweep plan Options DC solutions Write Final Solution Options DC solutions Use Initial Guess Transient : Options DC solutions Write Final Solution Options DC solutions Use Initial Guess I-V I-V SRC1 SRC2 x SRC1 ( ) I-V SRC1 SRC2 1-24

29 SRC1, SRC2 - SRC1 SRC2 ( ) I-V DC DC DC 2 (10 MΩ ) DC 2 ( Ohm) Options Perform topology check DC 1-25

30 1 : DC DC DC Simulation/Synthesis Messages 2 ( ) Simulation/Synthesis Messages Simulate > Highlight Node Simulation/Synthesis Messages Warning detected by HPEESOFSIM during DC analysis "DC1". Circuit as given has no unique solution. A virtual resistance of 1 TOhms was added to each node. 1-26

31 Tools > Check Representation > Open connections OK / Check Representation Tools > Check Representation Port/Pin mismatches : Unconnected pins: 0 Port/Pin mismatches: 0 2 : Unconnected pins: 2 I_DC SRC1, pin 2 (2.500,-0.125) BJT_NPN BJT1, pin 2 (3.250,0.375) View > Clear Highlighting DC ; 1-27

32 1 : DC DC : 1. DC Parameters 2. Max. Iterations 2 ( ) DC (1 TΩ ) DC harmonic balance ( ) DC Parameters DC DC : 1-28

33 Options DC, (KCL) KCL ( ) Current relative tolerance Current absolute tolerance : i n εrel in + ε abs i n = ε rel = ε abs = Current relative tolerance 10 6 ( %), Current absolute tolerance (1 pa) (Berkeley SPICE 3e ), 2 S ( S 2 )

34 1 : DC 2 S Voltage relative tolerance Voltage absolute tolerance Current absolute tolerance Current relative tolerance : V n ε rel V n + ε abs V n = V n = ε rel = ε abs = Voltage relative tolerance Voltage absolute tolerance 10 6 Current absolute tolerance Current relative tolerance 1-30

35 B binning D DC I-V Options DC K KCL ( ) O Options DC order DC DC DC Index-1

36 Index-2

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