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SaturatingAmplifier

Models a saturation amplifier

  • SaturatingAmplifier block

Libraries:
SerDes Toolbox / Datapath Blocks

Description

The SaturatingAmplifier block scales the input waveform according to a voltage in vs. voltage out response. The voltage in vs. voltage out response is specified either by the soft clipping response defined by Limit and Linear Gain, or by the VinVout matrix. The SaturatingAmplifier block applies memoryless nonlinearity to incoming waveform.

Ports

Input

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Input baseband signal, can be a sample-by-sample signal specified as a scalar, or an impulse response vector signal.

Data Types: double

Output

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Clipped output voltage, as specified by the SaturatingAmplifier block. If the input signal is a sample-by-sample signal specified as a scalar, the output is also scalar. If the input signal is an impulse response vector signal, the output is also a vector.

Data Types: double

Parameters

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Amplifier operating mode:

  • OffSaturatingAmplifier is bypassed and the input waveform remains unchanged.

  • OnSaturatingAmplifier scales the input waveform according to a voltage in vs. voltage out response.

Programmatic Use

  • Use get_param(gcb,'Mode') to view the current saturating amplifier operating Mode.

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

Input specification for limiting amplifier output:

  • 'Limit and Linear Gain' — Creates a soft clipping voltage in vs. voltage out response with the values specified in Limit and Linear Gain.

  • 'VinVout' — Generates output voltages corresponding to input voltage specified in VinVout. If any input voltage point falls outside the specified values, the output for that particular input voltage is interpolated.

Programmatic Use

  • Use get_param(gcb,'Specification') to view the current Specification of saturating amplifier.

  • Use set_param(gcb,'Specification',value) to set saturating amplifier to a specific Specification.

Data Types: char

Clipping voltage for the limiting amplifier, specified as a real positive scalar in V.

Dependencies

This parameter is only available when Specification is selected as 'Limit and Linear Gain'.

Programmatic Use

  • Use get_param(gcb,'Limit') to view the current value of Limit of saturating amplifier.

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

Data Types: double

Amplifier gain in the linear region, specified as a unitless real positive scalar.

Dependencies

This parameter is only available when Specification is selected as 'Limit and Linear Gain'.

Programmatic Use

  • Use get_param(gcb,'LinearGain') to view the current value of LinearGain of saturating amplifier.

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

Data Types: double

Input and corresponding output voltage response table, specified as an N×2 matrix in volts.

VinVout can be a 3-D table. In that case, you can select which slice of the VinVout is to use.

Dependencies

This parameter is only available when Specification is selected as 'VinVout'.

Programmatic Use

  • Use get_param(gcb,'VinVout') to view the current VinVout table value of saturating amplifier.

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

Data Types: double

Select which slice, family, or corner of a 3-D VinVout matrix to use during CTLE configuration.

You must set the Specification parameter to 'VinVout' to effectively use the Slice Select parameter. Depending on how many slices are available in your VinVout matrix, you can then select the slice you are interested in from a zero-based index available from the dropdown menu.

Programmatic Use

  • Use get_param(gcb,'SliceSelect') to view the current value of Slice select.

  • Use set_param(gcb,'SliceSelect',value) to set Slice select to a specific value.

Data Types: double

Click to plot the input vs. output voltage response of the Saturating Amplifier block.

IBIS-AMI parameters

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.

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

Version History

Introduced in R2019a

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