NAME_TABLE:

C_Function_Name: cm_d_buffer

Spice_Model_Name: d_buffer

Description: "digital one-bit-wide buffer"

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 buffer is a single-input, single-output digital buffer that produces as output a time-delayed copy of its input. The delays associated with an output rise and those associated with an output fall may be different. 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 buff1

.model buff1 d_buffer(rise_delay = 0.5e-9 fall_delay = 0.3e-9

+ input_load = 0.5e-12)