NAME_TABLE:

C_Function_Name: cm_filesource

Spice_Model_Name: filesource

Description: "File Source"

PORT_TABLE:

Port_Name: out

Description: "output"

Direction: out

Default_Type: v

Allowed_Types: [v,vd,i,id]

Vector: yes

Vector_Bounds: [1 -]

Null_Allowed: no

PARAMETER_TABLE:

Parameter_Name: timeoffset timescale

Description: "time offset" "timescale"

Data_Type: real real

Default_Value: 0.0 1.0

Limits: - -

Vector: no no

Vector_Bounds: - -

Null_Allowed: yes yes

PARAMETER_TABLE:

Parameter_Name: timerelative amplstep

Description: "relative time" "step amplitude"

Data_Type: boolean boolean

Default_Value: FALSE FALSE

Limits: - -

Vector: no no

Vector_Bounds: - -

Null_Allowed: yes yes

PARAMETER_TABLE:

Parameter_Name: amploffset amplscale

Description: "ampl offset" "amplscale"

Data_Type: real real

Default_Value: - -

Limits: - -

Vector: yes yes

Vector_Bounds: [1 -] [1 -]

Null_Allowed: yes yes

PARAMETER_TABLE:

Parameter_Name: file

Description: "file name"

Data_Type: string

Default_Value: "filesource.txt"

Limits: -

Vector: no

Vector_Bounds: -

Null_Allowed: yes

• Description:
  The File Source is similar to the Piece-Wise Linear Source, except that the waveform data is read from a file instead of being taken from parameter vectors. The file format is line oriented ASCII. `#' and `;' are comment characters; all characters from a comment character until the end of the line are ignored. Each line consists of two or more real values. The first value is the time; subsequent values correspond to the outputs. Values are separated by spaces. Time values are absolute and must be monotonically increasing, unless timerelative is set to TRUE, in which case the values specify the interval between two samples and must be positive. Waveforms may be scaled and shifted in the time dimension by setting timescale and timeoffset.
  Amplitudes can also be scaled and shifted using amplscale and amploffset. Amplitudes are normally interpolated between two samples, unless amplstep is set to TRUE.
• Note:
  The file named by the parameter filename in file="filename" is sought after according to a search list described in12.1.3.

Example SPICE Usage:

a8 %vd([1 0 2 0]) filesrc

.

.

.model filesrc filesource (file="sine.m" amploffset=[0 0] amplscale=[1 1]

+ timeoffset=0 timescale=1

+ timerelative=false amplstep=false)

Example input file:

# name: sine.m

# two output ports

# column 1: time

# columns 2, 3: values

0 0 1

3.90625e-09 0.02454122852291229 0.9996988186962042

7.8125e-09 0.04906767432741801 0.9987954562051724

1.171875e-08 0.07356456359966743 0.9972904566786902

...