NAME_TABLE:

C_Function_Name: cm_d_inverter

Spice_Model_Name: d_inverter

Description: "digital one-bit-wide inverter"

PORT_TABLE:

Port Name: in out

Description: "input" "output"

Direction: in out

Default_Type: d d

Allowed_Types: [d] [d]

Vector: no no

Vector_Bounds: - -

Null_Allowed: no no

PARAMETER_TABLE:

Parameter_Name: rise_delay fall_delay

Description: "rise delay" "fall delay"

Data_Type: real real

Default_Value: 1.0e-9 1.0e-9

Limits: [1.0e-12 -] [1.0e-12 -]

Vector: no no

Vector_Bounds: - -

Null_Allowed: yes yes

PARAMETER_TABLE:

Parameter_Name: input_load

Description: "input load value (F)"

Data_Type: real

Default_Value: 1.0e-12

Limits: -

Vector: no

Vector_Bounds: -

Null_Allowed: yes

• Description:
  The inverter is a single-input, single-output digital inverter that produces as output an inverted, time-delayed copy of its input. The delays associated with an output rise and those associated with an output fall may be specified independently. The model also posts an input load value (in farads) based on the parameter input load. The output of this model does not, however, respond to the total loading it sees on its output; it will always drive the output strongly with the specified delays.

Example SPICE Usage:

a6 1 8 inv1

.model inv1 d_inverter(rise_delay = 0.5e-9 fall_delay = 0.3e-9

+ input_load = 0.5e-12)