Spectre refers to the netlist language used by the Spectre Circuit Simulator and is closely related to SPICE. CedarEDA supports the following syntax elements in Spectre, please file an issue on our public issue tracker for Spectre features that are important to you, but are not yet implemented.
| Type | Spectre Element | Arguments |
|---|
| Voltage Source | vsource | type=dc, type=sin, type=pwl |
| Current Source | isource | type=dc, type=sin, type=pwl |
| Ideal Resistor | resistor | r |
| Ideal Capacitor | capactor | c |
| Ideal Inductor | inductor | l |
| Type | Model Type | Reference |
|---|
| BSIM4 MOSFET | {n,p}mos LEVEL=54 | [Supported Models] |
| Supported Commands | Example |
|---|
parameters | parameters rl=10k freq=1M |
Numbers in Spectre support the following scaling suffixes:
| Suffix | Scale |
|---|
| T | 10^12 |
| G | 10^9 |
| M | 10^6 |
| K | 10^3 |
| k | 10^3 |
| _ | 1 |
| % | 10^-2 |
| c | 10^-2 |
| m | 10^-3 |
| u | 10^-6 |
| n | 10^-9 |
| p | 10^-12 |
| f | 10^-15 |
| a | 10^-18 |
The following mathematical operators are supported:
| Operator | Meaning |
|---|
+ | Addition |
- | Subtraction |
* | Multiplication |
/ | Division |
^ | Exponentiation |
! | Boolean not |
== | Boolean equal |
!= | Boolean not equal |
> | Greater than |
< | Less than |
<= | Less than or equal |
>= | Greater than or equal |
The following mathematical functions are supported
| Function | Description |
|---|
max(x, y) | Maximum of x and y |
min(x, y) | Minimum of x and y |
abs(x) | Absolute value of x |
ln(x) | Logarithm of x to base ℯ |
log(x) | Logarithm of x to base ℯ |
log10(x) | Logarithm of x to base 10 |
exp(x) | ℯ^x |
pow(x,y) | x to the power of y |
sqrt(x) | Square root of x |
sinh(x) | Hyperbolic sine of x |
cosh(x) | Hyperbolic cosine of x |
tanh(x) | Hyperbolic tangent of x |
sin(x) | Sine of x (in radians) |
cos(x) | Cosine of x (in radians) |
tan(x) | Tangent of x (in radians) |
atan(x) | Inverse tangent of x |
arctan(x) | Inverse tangent of x |
asinh(x) | Inverse hyperbolic sine of x |
acosh(x) | Inverse hyperbolic cosine of x |
atanh(x) | Inverse hyperbolic tangent of x |
int(x) | Integer value less than or equal to x |
floor(x) | Integer value less than or equal to x |
ceil(x) | Integer value greater than or equal to x |