VGA

R2026b

Models a variable gain amplifier

• 

VGA block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
SerDes Toolbox / Datapath Blocks

Description

The VGA block scales the amplitude of the input waveform based on a gain specified by the user.

Ports

Input

WaveIn — Input signal

scalar | vector

Input signal to be scaled, specified as a scalar or vector.

Data Types: double

Output

WaveOut — Estimated channel output

scalar | vector

Estimated channel output, returned as a scalar or vector corresponding to the input signal.

Data Types: double

Parameters

Mode — VGA operating mode

On (default) | Off

VGA operating mode:

• Off — VGA is bypassed and the input waveform remains unchanged.

• On — VGA scales the input waveform according to the specified Gain.

Programmatic Use

• Use get_param(gcb,'Mode') to view the current VGA Mode.

• Use set_param(gcb,'Mode',value) to set VGA to a specific Mode.

Gain — Multiplicative gain used to scale the input waveform

1 (default) | scalar

Multiplicative gain used to scale the input waveform, specified as a unitless scalar.

Programmatic Use

• Use get_param(gcb,'Gain') to view the current value of Gain.

• Use set_param(gcb,'Gain',value) to set VGA Gain to a specific value.

Data Types: double

IBIS-AMI parameters

Mode — Include Mode parameter in IBIS-AMI model

on (default) | off

Select to include Mode as a parameter in the IBIS-AMI file. If you deselect Mode, it is removed from the AMI files, effectively hard-coding Mode to its current value.

Gain — Include Gain parameter in IBIS-AMI model

on (default) | off

Select to include Gain as a parameter in the IBIS-AMI file. If you deselect Gain, it is removed from the AMI files, effectively hard-coding Gain to its current value.

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"serdesDatapath/VGA"

Example: add_block("serdesDatapath/VGA","myModel/myBlock",MakeNameUnique="on")

Version History

Introduced in R2019a