Transition Label Syntax in Stateflow

The action types follow the label notation with this general format:
         event_or_message trigger[condition]{condition_action}/{transition_action}

Default Action Types for a State

If you do not specify the action type explicitly for a statement, the chart treats that statement as an entry action.

In fact, Matlab uses a mechanism called Action Language Auto Correction that automatically correct some syntax in state transition diagrams

Quote in LISP

The form 'foo is simply a faster way to type the special form
        (quote foo)
which is to say, "do not evaluate the name foo and replace it with its value; I really mean the name "foo".

Enumerated Name in Spectre/SpectreMDL

Note that an enumerated name needs a single quote mark (') in front.

Simulate DFF Setup/Hold Time Using SpectreMDL

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Smooth Function & Analytic Function

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Time-domain Illustration of Principle of Chopper Stabilized Amplifier

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Add Trigger Port to Stateflow Chart

In Stateflow Editor:
Chart -> Add Inputs & Outputs -> Event Input From Simulink

then in the popup dialog:

After adding the Trigger Port, the stateflow chart will look like

Exterior Derivatives of Differential Forms

Write out first-order form L as:

and replace each of the scalar factors (A, B, C) by its differential, formed in the ordinary sense.

Thus, if we associate with L the vector R=(A,B,C), we have the remarkable fact that the coefficients of dL are just the components of the curl of R.

The exterior derivative extends the concept of the differential of a function to differential forms of higher degree. (function itself is differential form of 0 degree)

"percent" Flag in Monte Carlo Simulation

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CIS: CMOS Image Sensor

CIS

Add Newline in Wavescan Label:

use <br>: 

SAR ADC & Charge Redistribution DAC

There is a extra Vin pin on SAR ADC caps array.

DNL of Charge Scaling DAC

TSMC model: difference between nch and nch_mac

Update pPar("param_name") parameter input

Suppose you have a cell, and want to change one of its device property from a definite value to a pPar value (that is, a parent parameter). After you change the property value, you have to add a dummy pin and then recreate the symbol view. That way, the pPar parameter is updated correctly.

Errors in Allen's CMOS Analog Circuit Design

DAC INL/DNL

Closed Differential Form & Exact Differential Form

If the coefficients of the differential form

has continuous first derivatives in a simply connected set R and satisfy the integrability conditions

then L is the total differential of a function u defined in R, and:

interesting property related to DAC INL

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DAC Transfer Function

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DNL of DAC

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Type in Distribution Symbol in Mathematica

\dist

Noncentral Χ-Squared Distributions

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Check Monte Carlo Simulation Simulation Netlist in ADE (IC5141)

Get Monte Carlo simulation netlist in IC5141

The Monte Carlo portion of the netlist is shown below:

mc1 montecarlo numruns=100 seed=1 variations=mismatch donominal=yes \

    scalarfile="../monteCarlo/mcdata" paramfile="../monteCarlo/mcparam" \

    saveprocessparams=yes processparamfile="../monteCarlo/processParam" \

    processscalarfile="../monteCarlo/processData" savefamilyplots=yes \

    sampling=lhs {

        dcOp dc write="spectre.dc" maxiters=150 maxsteps=10000 annotate=status

        dcOpInfo info what=oppoint where=rawfile

        modelParameter info what=models where=rawfile

        element info what=inst where=rawfile

        outputParameter info what=output where=rawfile

        designParamVals info what=parameters where=rawfile

        primitives info what=primitives where=rawfile

        subckts info what=subckts  where=rawfile

        export noExprs=oceanEval("0")

}

Branch Cut & Branch Points

In general, branch cuts are not unique, but are instead chosen by convention to give simple analytic properties (Kahan 1987).

An alternative to branch cuts for representing multivalued functions is the use of Riemann surfaces.

In addition to branch cuts, singularities known as branch points also exist. It should be noted, however, that the endpoints of branch cuts are not necessarily branch points.

Single-Valued Analytic Branch

Complex Power Function

Complex Power Function is defined by

Mismatch Simulation

When simulating with mismatch, spectre will generate a random value for each of the varied global parameters for each subckt instance. 

There is a commonly mistaken belief that you must use inline subckts for mismatch simulation. In fact, the subckt does not need to be inline, that is merely to make back-annotation of operating point data simpler because the result database does not contain an additional level of hierarchy for the inline device.

Pick a Particular Iteration from Monte Carlo Simulation Result

value(VT("/myOut")   'iteration <iterationNumberHere>)

pv

pv( t_name t_param)

• Returns the value for the specified component parameter. 
• You can use the outputParams command to get the list of parameters for a particular component.

Spectre Gotcha! -- parameters

parameters not parameter

parameters   rval=948

Specifying Parameter Distributions in Spectre -- Use Statistics Blocks

Statistics block can contain:

• One or more process blocks;
• One or more mismatch blocks;
• One or more correlation statements;
• A truncate statement (for generating truncated distributions);

Process blocks:

• sampled once per Monte Carlo run

Mismatch blocks:

• sampled once per subcircuit instance

Correlation statements:
Two types of correlation statements that you can use:

• Process parameter correlation statements
• Instance or mismatch correlation statements (matched devices)

Sample Monte Carlo Analysis

mc2 montecarlo donominal=no variations=mismatch seed=1234 numruns=200 {

      dcop2 dc

      tran2 tran start=0 stop=1u

      export slewrate=oceanEval("slewRate(v(\"vout\"),10n,t,30n,t,10,90 )"

}

Notes:

1. Monte Carlo analysis statement applies only mismatch variations (variations=mismatch);
2. It does not perform a nominal run (donomial=no).