ASITIC Documentation: Optimization

Optarea: Optimize the Area of a Square Spiral

OptArea

Aliases: optarea,opta

Warning: This command is under construction.

You will be prompted for the following optimization constraints:

Desired inductance and accuracy -- Enter inductance inunits of nH and the accuracy in percent, i.e. '3 10' for3nH within 10%.

Name -- Name of optimal spiral.

Fixed Spacing -- Metal-to-metal spacing value.

Min/Step/Max Width -- Sweep the metal width in this range.

Min/Step/Max Length -- Range to sweep outer length ofsquare spiral.

Metal layer -- Metal layer for winding inductance.

Exit metal layer -- Exit metal layer of spiral.

Frequency -- Frequency of analysis (GHz).

Min Q -- Minimum desired quality factor.

Optimization is done by searching the subspace of inductors varying at each step width W, outer length L, and turns N. Only inductors meeting the electrical constraint of inductance and quality value are considered and the device with highest quality factor Q is reported. Analysis is performed by using the pi command.

Optl: Optimize the Q of a Square Spiral

OptSq

Aliases: optl,optsq

You will be prompted for the following optimization constraints:

Desired inductance and accuracy -- Enter inductance inunits of nH and the accuracy in percent, i.e. '3 10' for3nH within 10%.

Name -- Name of optimal spiral.

Length -- Outer length of square spiral.

Min/Step/Max Spacing -- Sweep the metal-to-metal spacing in

this range. For a single spacing, use Max < Min + Step.

Min/Step/Max Width -- Sweep the metal width in this range.

Metal layer -- Metal layer for winding inductance.

Exit metal layer -- Exit metal layer of spiral.

Frequency -- Frequency of analysis (GHz).

Optimization is done by searching the subspace of inductors varying at each step width W, spacing S, and turns N. Only inductors meeting the electrical constraint of inductance value are considered and the device with highest quality factor Q is reported. Analysis is performed by using the pi command.

Optlsympoly: Optimize the Q of a Symmetric Polygon Inductor

OptSymPoly

Aliases: optlsympoly,optlbalpoly,optlsympoly,optsympoly

You will be prompted for the following optimization constraints:

Desired inductance and accuracy -- Enter inductance inunits of nH and the accuracy in percent, i.e. '3 10' for3nH within 10%.

Name -- Name of optimal spiral.

Radius -- Outer Radius of structure.

P=Number of sides -- Generate an N-gon spiral, P > 4.

Min/Step/Max Spacing -- Sweep the metal-to-metal spacing in

this range. For a single spacing, use Max < Min + Step.

Min/Step/Max Width -- Sweep the metal width in this range.

Metal layer -- Metal layer for winding inductance.

Transition metal layer -- Metal exchange metal layer to employ.

Frequency -- Frequency of analysis (GHz).

Optimization is done by searching the subspace of symmetric polygon inductors varying at each step width W and turns N. Only inductors meeting the electrical constraint of inductance value are considered and the device with the highest quality factor Q is reported. Analysis is performed by using the pi command.

Optlsymsq: Optimize the Q of a Symmetric Square Inductor

OptSymSq

Aliases: optlsymsq,optlbalsq,optlsymsquare,optsymsq

You will be prompted for the following optimization constraints:

Desired inductance and accuracy -- Enter inductance inunits of nH and the accuracy in percent, i.e. '3 10' for3nH within 10%.

Name -- Name of optimal spiral.

Length -- Outer length of square spiral.

Min/Step/Max Spacing -- Sweep the metal-to-metal spacing in

this range. For a single spacing, use Max < Min + Step.

Min/Step/Max Width -- Sweep the metal width in this range.

Metal layer -- Metal layer for winding inductance.

Exit metal layer -- Exit metal layer of spiral.

Frequency -- Frequency of analysis (GHz).

Optimization is done by searching the subspace of symmetric square inductors varying at each step width W and turns N. Only inductors meeting the electrical constraint of inductance value are considered and the device with the highest quality factor Q is reported. Analysis is performed by using the pi command.

Optpoly: Optimize the Q of a Polygon Spiral

OptPoly

Aliases: optpoly

You will be prompted for the following optimization constraints:

Desired inductance and accuracy -- Enter inductance inunits of nH and the accuracy in percent, i.e. '3 10' for3nH within 10%.

Name -- Name of optimal spiral.

Length=2*Radius -- Outer length of spiral.

Spacing -- Fixed metal-to-metal spacing.

Min/Step/Max Width -- Sweep the metal width in this range.

Metal layer -- Metal layer for winding inductance.

P=Number of sides -- Generate an N-gon spiral, P > 4.

Frequency -- Frequency of analysis (GHz).

Optimization is done by searching the subspace of inductors varying at each step width W and turns N. Only inductors meeting the electrical constraint of inductance value are considered and the device with the highest quality factor Q is reported. Analysis is performed by using the pi command.

Sweep: Sweep the Geometry of a Spiral Searching for Optimal Devices

SW (FNAME:NAME:FREQ:LMIN:LMAX:MINQ:AMIN:AINC:AMAX:SMIN:SINC:SMAX:WMIN:WINC:WMAX:METAL:EXIT:(SIDES:(TAP)))

Aliases: sweep,sweepopt,optsweep,sw

You can enter the following options either through the prompt or by specifying named arguments:

Sweep Filename : FNAME -- Filename where output will be saved.

Spiral Name : NAME -- Name of spiral.

Frequency : FREQ -- Frequency of analysis (GHz).

Electrical Constraints:

Inductance Range : LMIN,LMAX -- Minimum and maximum inductance range bracketing search (LMIN,LMAX) or desired inductance (nH) and accuracy (percent).

Minimum Q-factor : MINQ -- Minimum quality-factor Q for inductor.

Geometric Constrains:

Length/Radius Range: AMIN,AINC,AMAX -- Sweep either length or radius in this range (microns).

Spacing Range: SMIN,SINC,SMAX -- Sweep metal-to-metal spacing in this range.

Width Range: WMIN,WINC,WMAX -- Sweep metal width in this range.

Metal layer: METAL -- Metal layer of spiral.

Exit metal : EXIT -- Exit layer of spiral.

Number of sides : SIDES -- Number of sides. If SIDES=4, limit search to square spiral inductors. Otherwise, usepolygon spiral inductors.

TAP -- Name of spiral which serves as a substrate tap orgrounding structure.

Search the space of inductors satisfying the specified geometric constraints and record each spiral meeting the specified geometric constrains. The pix command is used for the analysis.

Sweepmm: Sweep the Geometry of a MM Spiral Searching for Optimal Devices

SWMM (FNAME:NAME:FREQ:LMIN:LMAX:MINQ:AMIN:AINC:AMAX:WID:SMIN:SINC:SMAX:WMIN:WINC:WMAX:METAL:EXIT:(SIDES:SIMTYPE:(TAP)))

Aliases: sweepmm,sweepoptmm,optsweepmm,swmm

You can enter the following options either through the prompt or by specifying named arguments:

Sweep Filename : FNAME -- Filename where output will be saved.

Spiral Name : NAME -- Name of spiral.

Frequency : FREQ -- Frequency of analysis (GHz).

Electrical Constraints:

Inductance Range : LMIN,LMAX -- Minimum and maximum inductance range bracketing search (LMIN,LMAX) or desired inductance (nH) and accuracy (percent).

Minimum Q-factor : MINQ -- Minimum quality-factor Q for inductor.

Geometric Constrains:

Length/Radius Range: AMIN,AINC,AMAX -- Sweep either length or radius in this range (microns).

Spacing Range: SMIN,SINC,SMAX -- Sweep metal-to-metal spacing in this range.

Width Range: WMIN,WINC,WMAX -- Sweep metal width in this range.

Top metal layer: METAL -- Topmost metal layer of spiral.

Bottom metal layer : EXIT -- Bottom metal layer of spiral.

Number of sides : SIDES -- Number of sides. If SIDES=4, limit search to square spiral inductors. Otherwise, usepolygon spiral inductors.

SIMTYPE -- Ignored parameter.

TAP -- Name of spiral which serves as a substrate tap orgrounding structure.

Search the space of multi-layer series connected inductors satisfying the specified geometric constraints and record each spiral meeting the specified geometric constrains. The pix command is used for the analysis.

Sweepsh: Sweep the Geometry of a Stacked Shunt Spiral Searching for Optimal Devices

SWSH (FNAME:NAME:FREQ:LMIN:LMAX:MINQ:AMIN:AINC:AMAX:WID:SMIN:SINC:SMAX:WMIN:WINC:WMAX:METAL:EXIT:(SIDES:SIMTYPE:(TAP)))

Aliases: sweepsh,sweepshunt,sweepmmsh,swsh

You can enter the following options either through the prompt or by specifying named arguments:

Sweep Filename : FNAME -- Filename where output will be saved.

Spiral Name : NAME -- Name of spiral.

Frequency : FREQ -- Frequency of analysis (GHz).

Electrical Constraints:

Inductance Range : LMIN,LMAX -- Minimum and maximum inductance range bracketing search (LMIN,LMAX) or desired inductance (nH) and accuracy (percent).

Minimum Q-factor : MINQ -- Minimum quality-factor Q for inductor.

Geometric Constrains:

Length/Radius Range: AMIN,AINC,AMAX -- Sweep either length or radius in this range (microns).

Spacing Range: SMIN,SINC,SMAX -- Sweep metal-to-metal spacing in this range.

Width Range: WMIN,WINC,WMAX -- Sweep metal width in this range.

Top metal layer: METAL -- Topmost metal layer of spiral.

Bottom metal layer : EXIT -- Bottom metal layer of spiral.

Number of sides : SIDES -- Number of sides. If SIDES=4, limit search to square spiral inductors. Otherwise, usepolygon spiral inductors.

SIMTYPE -- Ignored parameter.

TAP -- Name of spiral which serves as a substrate tap orgrounding structure.

Search the space of multi-layer shunt connected inductors satisfying the specified geometric constraints and record each spiral meeting the specified geometric constrains. The pix command is used for the analysis.

Sweeptaper: Optimize a Taper Square Spiral Inductor

SWTAPER (FNAME:NAME:FREQ:LMIN:LMAX:MINQ:AMIN:AINC:AMAX:PMIN:PINC:PMAX:WMIN:WINC:WMAX:S:METAL:EXIT)

Aliases: sweeptaper,sweepopttaper,optsweeptaper,swtaper

You can enter the following options either through the prompt or by specifying named arguments:

Sweep Filename : FNAME -- Filename where output will be saved.

Spiral Name : NAME -- Name of spiral.

Frequency : FREQ -- Frequency of analysis (GHz).

Electrical Constraints:

Inductance Range : LMIN,LMAX -- Minimum and maximum inductance range bracketing search (LMIN,LMAX) or desired inductance (nH) and accuracy (percent).

Minimum Q-factor : MINQ -- Minimum quality-factor Q for inductor.

Geometric Constrains:

Outer Length Range: AMIN,AINC,AMAX -- Sweep either length or radius in this range (microns).

Min/Inc/Max Percent Tapering : PMIN:PINC:PMAX -- Range oftapering. Percent tapering is defined as the percentagechange in width traversing the outer turn to the inner turn.

Spacing: S -- Sweep metal-to-metal spacing in this range.

Width Range: WMIN,WINC,WMAX -- Sweep metal width in this range.

Top metal layer: METAL -- Topmost metal layer of spiral.

Exit metal layer: EXIT -- Topmost metal layer of spiral.

Search the space of square taper inductors satisfying the specified geometric constraints and record each spiral meeting the specified geometric constrains. The pix command is used for the analysis.

ASITIC Documentation: Optimization

Contents:

Optarea: Optimize the Area of a Square Spiral

Optl: Optimize the Q of a Square Spiral

Optlsympoly: Optimize the Q of a Symmetric Polygon Inductor

Optlsymsq: Optimize the Q of a Symmetric Square Inductor

Optpoly: Optimize the Q of a Polygon Spiral

Sweep: Sweep the Geometry of a Spiral Searching for Optimal Devices

Sweepmm: Sweep the Geometry of a MM Spiral Searching for Optimal Devices

Sweepsh: Sweep the Geometry of a Stacked Shunt Spiral Searching for Optimal Devices

Sweeptaper: Optimize a Taper Square Spiral Inductor