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Nexxim Simulator >
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Current-Controlled Current Source, Piecewise Linear

Current-Controlled Current Source, Piecewise Linear

Piecewise Linear CCCS Netlist Format

The format for a piecewise linear current-controlled current source (CCCS) is:

Fxxxx out+ out- [CCCS] PWL(1) vin

[DELTA=val] [SCALE=scale] [M=val]

[TC1=val] [TC2=val]

x1 y1 [... xK yK ]

out+ is the positive node and out- is the negative node of the current source. The entry CCCS is the default for the F element type. The entry PWL is required to identify the piecewise linear CCCS type. vin is the voltage source through which the control current flows. The input voltage source must be defined elsewhere in the netlist.

The x y pairs are the input current values and the corresponding output voltage values. For intermediate values that are not in the list of x values, the simulator calculates the corresponding output by interpolation from the given values. The use of the DELTA parameter allows you to control the curvature of the interpolation to guarantee that the 1st derivative of the curve is continuous.

**Piecewise Linear CCCS Instance Parameters**
Parameter	Description	Unit	Default
DELTA	Distance over which curvature is applied in the interpolation function Zero produces linear interpolation, positive values produce continuous curvature over the waveform Maximum is one-half of the smallest difference between control (input) values	None	One-fourth of the smallest difference between control (input) values
M	Multiplier to simulate multiple elements	None	1.0
SCALE	Multiplier for current	None	1.0
TC1	Linear (1st-order) temperature coefficient	°K^-1	0.0
TC2	Quadratic (2nd-order) temperature coefficient	°K^-2	0.0

Piecewise Linear CCCS Netlist Examples

Fpwl1 30 0 CCCS PWL(1) 21 0
+ 0.0 0.0
+ 0.5e-3 0.1e-3
+ 1.0e-3 0.2e-3
+ 4.0e-3 4.5e-3
+ 4.5e-3 4.75e-3
+ 5.0e-3 5.0e-3

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