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Parasitic Components

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You can use the parasitic components of anlogLib to account for the effect of parasitics on analog circuits. By accounting for the effect of parasitics, you can improve the accuracy of your circuit simulations. These components are usually used during Diva extraction and are placed in an extracted view. Although these components are similar to the normal components, they appear only in extracted views.

Symbol: pcapacitor

Parasitic Capacitor

Command-line help

spectre -h capacitor

CDF Parameters

CDF Parameter Label	CDF Parameter	spectre	auCdl	auLvs	hspiceD	UltraSim
Capacitance	c	x	x	x	x	x
Initial condition	ic	x	-	-	x	x
Model name	model	x	-	-	-	-
Width	w	x	-	-	x	x
Length	l	x	-	-	x	x
Multiplier	m	x	-	-	x	x
Scale factor	scale	x	-	-	x	x
Temp rise from ambient	trise	x	-	-	-	-
Temperature coefficient 1	tc1	x	-	-	x	x
Temperature coefficient 2	tc2	x	-	-	x	x
Number of Polynomial Coeffs	polyCoef	-	-	-	x	x
Temperature difference	dtemp	-	-	-	x	x

Symbol: pdiode

Parasitic Diode

Command-line help

spectre -h diode

CDF Parameters

CDF Parameter Label	CDF Parameter	spectre	auCdl	auLvs	hspiceD	UltraSim
Model name	model	x	-	-	-	-
Device area	area	x	-	-	x	x
Device initially off	off	-	-	-	x	x
Initial diode voltage	Vd	-	-	-	x	x
Junction perimeter factor	perim	x	-	-	-	-
Length	l	x	-	-	x	x
Width	w	x	-	-	x	x
Multiplier	m	x	-	-	x	x
Scale factor	scale	x	-	-	-	-
Temp rise from ambient	trise	x	-	-	-	-
Estimated operating region	region	x	-	-	-	-
Periphery of junction	pj	-	-	-	x	x
Width of polysilicon	wp	-	-	-	x	x
Length of polysilicon	lp	-	-	-	x	x
Width of metal capcitor	wm	-	-	-	x	x
Length of metal capcitor	lm	-	-	-	x	x
Temperature difference	dtemp	-	-	-	x	x

Symbol: pinductor

Parasitic Inductor

Command-line help

spectre -h inductor

CDF Parameters

CDF Parameter Label	CDF Parameter	spectre	auCdl	auLvs	hspiceD	UltraSim
Inductance	l	x	x	x	x	x
Initial condition	ic	x	-	-	x	-
Model name	model	x	-	-	-	-
Resistance	r	x	-	-	x	x
Multiplier	m	x	-	-	x	x
Temp rise from ambient	trise	x	-	-	-	-
Scale factor	scale	-	-	-	x	x
Number of Polynomial Coeffs	polyCoef	-	-	-	x	-
Temperature coefficient 1	tc1	-	-	-	x	x
Temperature coefficient 2	tc2	-	-	-	x	x
Temperature difference	dtemp	-	-	-	x	x

Syntax/Synopsis

Name ( 1 2 ) ModelName <parameter=value> ...

Name ( 1 2 ) inductor <parameter=value> ...

Following is the model synopsis:

model ModelName inductor <parameter=value> ...

Example

Following is a sample instance statement without model:

l33 (0 net29) inductor l=10e-9 r=1 m=1

Following is a sample instance statement with model:

l33 (0 net29) ind l=10e-9 r=1 m=1

Following is the sample model statement:

model ind inductor l=6e-9 r=1 tc1=1e-12 tc2=1e-12 tnom=25

Additional Information

This device is supported within the altergroups.

Symbol: pmind

Parasitic Mutual Inductor

Command-line help

spectre -h mutual_inductor

CDF Parameters

CDF Parameter Label	CDF Parameter	spectre	auCdl	auLvs	hspiceD	UltraSim
First coupled inductor	ind1	x	-	-	-	-
Second coupled inductor	ind2	x	-	-	-	-
Coupling coefficient	k	x	-	-	x	x

Syntax/Synopsis

Name mutual_inductor <parameter=value> ...

Example

Sample instance statement with two inductors:

l1 (1 0) inductor

l2 (2 0) inductor

ml1 mutual_inductor coupling=1 ind1=l1 ind2=l2

Additional Information

This device is not supported within the altergroups.

Symbol: presistor

Parasitic Resistor

Command-line help

spectre -h resistor

CDF Parameters

CDF Parameter	CDF Parameter	spectre	auCdl	auLvs	hspiceD	UltraSim
Resistance	r	x	x	x	x	x
Temperature coefficient 1	tc1	x	-	-	x	x
Temperature coefficient 2	tc2	x	-	-	x	x
Model name	model	x	-	-	-	-
Length	l	x	-	-	x	x
Width	w	x	-	-	x	x
Resistance Form	resform	x	-	-	-	-
Multiplier	m	x	-	-	x	x
Scale factor	scale	x	-	-	x	x
Temp rise from ambient	trise	x	-	-	-	-
Generate noise?	isnoisy	x	-	-	-	-
Capacitance connected	hrc	-	-	-	x	x
Temperature difference	dtemp	-	-	-	x	x
AC resistance	ac	-	-	-	x	-
Capacitance	c	-	-	x	-	-

Syntax/Synopsis

Name ( 1 2 ) ModelName <parameter=value> ...

Name ( 1 2 ) resistor <parameter=value> ...

Following is the model synopsis:

model ModelName resistor <parameter=value> ...

Example

Following is a sample without model:

r1 (1 2) resistor r=1.2K m=2

Following is a sample with model:

r1 (1 2) resmod l=8u w=1u

Following is a sample model statement:

model resmod resistor rsh=150 l=2u w=2u etch=0.05u tc1=0.1 tnom=27 kf=1

Additional Information

This device is supported within the altergroups.

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