demo_ind

1. Symbol:

2. Demo kit Inductors:

a) Parameters:

Name	Description	Unit	Default
Type	Four types of inductors are available. See description below. Depending on the current carrying requirements & inductance value, choose proper type.	nil	ind1
No.of turns(nturns)	Enter the required no of turns. These are square spirals, hence quarter turns only are allowed.	nil	2.5
Inductance(L)	Inductance value is calculated from empirical equations. This is not editable	nH	1.5
Rotation	Rotation parameter of under pass metal. Choose proper value, depending on the layout requirements. L value does not change with rotation.	nil	left

b) Range:

Type1 (ind1), width = 5 um, spacing = 5 um ; nturns = 1 to 6 turns in step of 0.25

Type2 (ind2), width = 10 um, spacing = 5 um ; nturns = 1 to 4 turns in step of 0.25

Type3 (ind3), width = 10 um, spacing = 10 um ; nturns = 1 to 4 turns in step of 0.25

Type4 (ind4), width = 15 um, spacing = 10 um ; nturns = 1 to 4 turns in step of 0.25

3. Equivalent Circuit:

4. Notes:

a) From EM simulated data, equivalent circuit parasitic values are estimated. The scaling of parasitic element values is done for the valid range of no of turns. Then each parasitic element is curve fitted (typically to 5^th order) and then model is net listed.

b) Proper transmission lines should be used (M1 or M2) for connecting the inductors.

c) All the inductors are synchronized with layouts.

5. Model accuracies:

There can be subtle difference between EM data and the schematic due to mathematical limitations of model.

Type = ind1 ; nturns = 2.5 ; Calculated Inductance, L = 1.5 nH ; rotation = left

6. Cross-section View:

The above cross section view is not to scale.